Incorporation of Intraguild Predation Into a Pest Management Decision-Making Tool: The Case of Thrips and Two Pollen-Feeding Predators in Strawberry
|
|
- Berniece Robinson
- 5 years ago
- Views:
Transcription
1 BIOLOGICAL AND MICROBIAL CONTROL Incorporation of Intraguild Predation Into a Pest Management Decision-Making Tool: The Case of Thrips and Two Pollen-Feeding Predators in Strawberry SULOCHANA SHAKYA, 1,2 MOSHE COLL, 1 AND PHYLLIS G. WEINTRAUB 3 J. Econ. Entomol. 103(4): 1086Ð1093 (2010); DOI: /EC09373 ABSTRACT Action thresholds are traditionally based on the density of pests and the economic damage they cause to crops. Pest damage assessments are usually made in a sterile environment, devoid of extenuating factors such as predators, parasitoids, and alternative food sources. Recently, the effects of a predator or parasitoid species have been considered. However, interactions between natural enemy species (intraguild predation and interference), which are common in agricultural Þelds, have not been incorporated yet into decision-making tools. We conducted a series of leaf disc and potted plant trials to evaluate the effects of two predator species, the anthocorid Orius laevigatus (Fieber) and the phytoseiid Neoseiulus cucumeris (Oudemans) on the density of and fruit damage inßicted by western ßower thrips, Frankliniella occidentalis (Pergande). We then used the obtained results to develop a pest management decision-making tool for the control of western ßower thrips. Because strawberries (Fragaria ananassa Duchesne) ßower in cycles, pollen, a food source for both predators and the pest, is periodically available in the system and has also been incorporated in our decision-making tool. The developed new management tool would allow the relaxation of the economic threshold (ET) for western ßower thrips in strawberry ßowers. The presence of an average of a single O. laevigatus per ßower for example, may allow that relaxation of the ET by 40% (from 10 to 14 western ßower thrips per ßower) when pollen is available during the winter. Because Þeld monitoring shows that O. laevigatus populations in Israeli strawberry often reach mean densities of three to four per ßower, the new approach promises to drastically reduce the employment of toxic insecticides. KEY WORDS intraguild predation, pest management tools, predators, pollen, western ßower thrips 1 Department of Entomology, The Hebrew University of Jerusalem, P.O. Box 12, Rehovot 76100, Israel. 2 Current address: Himalayan College of Agricultural Sciences and Technology (HICAST), Purbanchal University, P.O. Box 13233, Kathmandu, Nepal. 3 Corresponding author: Department of Entomology, Agricultural Research Organization, Gilat Research Center, D.N. Negev 85280, Israel ( phyllisw@volcani.agri.gov.il). Traditionally, pest control recommendations have been based solely on estimates of pest density. In such pest management programs, results of pest monitoring in the Þeld are compared with established economic thresholds (ETs), and control measures are recommended to prevent pest populations from reaching economically damaging levels. More recently, a few studies have also considered the density of a pestõs natural enemy in the Þeld, thus allowing the relaxation of the ET (Brown 1997, Conway et al. 2006, Musser et al. 2006, Zhang and Swinton 2009). Yet, natural enemies rarely operate alone; they are often part of a suite or guild of predators and parasitoids that act simultaneously to reduce pest infestation. This guild may act additively or even synergistically, when one enemy facilitates the activity of another (e.g., Losey and Denno 1998). However, antagonistic interactions between natural enemies and intraguild predation (IGP) in particular, are common and may actually hamper herbivore suppression (Stiling 1993; Rosenheim et al. 1993, 1995). Intraguild (IG) predators and parasitoids have been shown to have a signiþcant effect on each other as well as on pest populations in many laboratory and Þeld experiments (see Colfer et al. 2003, and references therein; Hougardy and Mills, 2009). Yet, to date, the simultaneous activity of several natural enemy species have not been incorporated in the calculation of action thresholds and pest management decision-making tools. The overall objective of this study was to develop a decision making tool for the control of western ßower thrips, Frankliniella occidentalis (Pergande), in strawberry (Fragaria ananassa Duchesne), which incorporates the activities of two predatory species, the anthocorid Orius laevigatus (Fieber) and the phytoseiid Neoseiulus cucumeris (Oudemans), and the IG interactions between them. The three arthropod species in the system also are known to feed on pollen (Coll 1998, van Rijn and Sabelis 1990, Skirvin et al. 2007, Wackers et al. 2007). Because strawberry plants have three to four ßowering cycles during the growing season, we also incorporated pollen availability in our /10/1086Ð1093$04.00/ Entomological Society of America
2 August 2010 SHAKYA ET AL.: IGP AND PEST MANAGEMENT DECISIONS 1087 model. The majority of the crop in Israel ( 400 ha total) is produced under low tunnels on the coastal plain between September and May. The tunnel cover is opened during most of the days, to reduce humidity buildup and the associated fungi infestation. Israeli growers usually monitor western ßower thrips in the ßowers (Coll et al. 2007) because (i) there is a strong correlation between thrips count in ßowers and fruit damage, and (ii) thrips occurrence in ßowers provides early warning for damage to young fruit (Steiner and Goodwin 2005; Coll et al. 2007). This is the Þrst time the incorporation of IG predatory interactions into a decision-making tool has been proposed for the management of an agricultural pest. The new approach promises to more accurately predict enemy impact on pest populations and thus increase reliability of the decision-making tool. This in turn would act to increase the adoption of these tools by growers, further reducing the employment of pesticides that hamper biological control and harm human health and the environment. Materials and Methods Plants. Strawberry plants (Ô328Õ) were transplanted in a mixture of vermiculite and potting soil, provided with slow release fertilizer (Osmocote Plus, 15N-8P- 11K tablets; Scotts Horticulture Products, Marysville, OH) and drip irrigation lines in the greenhouse. The plants were grown under natural light at 20 3 C. The ßowers were hand pollinated using a camelõs hair paint brush. To prevent spontaneous infestation of powdery mildew, plants were sprayed with Stroby 50 WP (active ingredient [AI] kresoxin-methyl, 0.03%; BASF, Ludwigshafen, Germany), Heliogofrit (AI sulfur, 0.02%; Action PIN, Dax, France), OÞr 2000 EW (AI penconazole, 0.05%; Syngenta, Wilmington, DE), and Triforine (AI piperazine with emulsiþers; American Cyanamid Company, Wayne, NJ) on an alternate basis according to label instructions. Mature, senescing leaves were removed occasionally. Western Flower Thrips. Field-collected western ßower thrips were reared in 1-liter glass jars and provided with Phaseolus vulgaris L. seedlings and pods (Ô4095Õ, Ben Shahar Co., Israel). The jars were kept in a growth chamber at 25 1 C and a photoperiod of 16:8 (L:D) h. Pods and seedlings were replaced every 3Ð4 d. Upon removal, old pods and seedlings were transferred to new rearing jars containing a fresh bean pod and seedling. Predators. O. laevigatus was cultured in the laboratory from females obtained from Bio-Bee Biological Systems (Kibbutz Sde Elyahu, Israel). Cultures were held in growth cabinets under 25 1 C, 70 10% RH, and a photoperiod of 16:8 (L:D) h and fed eggs of Ephestia kuehniella Zeller (Lepidoptera: Pyralidae). Bean pods were provided for moisture, to supplement predatorsõ diet, and to serve as an oviposition substrate. Ephestia eggs were obtained from a laboratory culture, and bean pods were collected from potted plants grown in the greenhouse. Table 1. Treatment combinations used to test the effect of pollen and two predators a on western flower thrips suppression and subsequent reduction in fruit damage Independent Treatment b variable Pollen N. cucumeris (60 adults) O. laevigatus (3 adult females) a Predators were released on all plant organs. b indicates with and Ð indicates without the independent variables listed. N. cucumeris was obtained from Bio-Bee and reared on mold mites, Tyrophagus putrescentiae (Schrank), infested wheat bran. Before trials commenced, N. cucumeris were acclimated for several generations on strawberry pollen. Preliminary experiments indicated that the survival, development, and reproduction of these mites on strawberry pollen are approximately the same as that on thrips prey. Influence of Pollen Availability and Predator Activity on Thrips Population and Thrips-Inflicted Fruit Damage. The trial was conducted in a walk-in rearing room at 25 1 C, 60Ð70% RH, and a photoperiod of 13:11 (L:D) h. Potted strawberry plants (three leaves, three ßowers, and three whitish-pinkish fruit) were held individually in screened cages (0.4 by 0.4 by 0.4 m) and watered manually daily. Eight treatment combinations (the presence of pollen, N. cucumeris and O. laevigatus) were established and replicated four times in this nonchoice experiment (Table 1). The nonchoice setting, either with or without pollen, mimics the situation in the Þeld; each Þeld is either ßowering or not ßowering. In treatments without pollen, anthers were removed from all the ßowers before pollen maturation. On day 1, cohorts of 15 adult female western ßower thrips (3Ð4 d after eclosion) were introduced onto each caged plant. Thrips were allowed to oviposit for 6 d before the predators were released. Because these female thrips were expected to oviposit daily at 25 C (Whittaker and Kirk 2004), and taking into account a 3-d incubation period of the eggs, a continuous supply of immature thrips is most likely to have been produced over the duration of the trial. On day 6, three adult O. laevigatus and 60 adult N. cucumeris ( 0.3 and 6.6 bugs and mites per plant part, respectively) were released in each cage. All the releases were made 1Ð2 h before scotophase, to allow predators to acclimate. On day 10, the level of western ßower thrips-inßicted damage to the matured fruit was scored as follows: 0, no damage; 1, light spotting, slight browning of calyx; 2, 25% surface damage (bronzing, punctures); 3, 50% surface damage (bronzing, punctures, surface russeting); 4, 75% surface damage (bronzing, punctures, surface russeting, sucking parts around the achenes); 5, severe damage. During scotophase of that day (day 10), all plant parts were examined for O. laevigatus, then detached and separately washed in 70% ethyl
3 1088 JOURNAL OF ECONOMIC ENTOMOLOGY Vol. 103, no. 4 alcohol to remove all arthropods that were subsequently counted under a stereomicroscope. Data were analyzed by a three-way factorial analysis of variance (ANOVA) to test for interactive effects of predators and pollen. To homogenize error variance, data were square root transformed before analysis. Means were compared by TukeyÐKramer ( 0.05), if ANOVA results were signiþcant. Adjustment of ET. Thresholds for western ßower thrips have been developed for Israeli strawberries produced for the local and export markets (Coll et al. 2007). These thresholds were 24 and 10 western ßower thrips per ßower, respectively. To relax these ET, we tested predation rate of western ßower thrips by O. laevigatus and N. cucumeris when acting alone, in the presence and absence of pollen. The combined effect of the two predators on western ßower thrips was tested in a companion study (Shakya et al. 2009). Results indicated that in 24 h O. laevigatus preyed upon N. cucumeris in the presence of pollen and mites in its absence. These values together with results included in the present report, were used to adjust the ET used for western ßower thrips management. To quantify predation of western ßower thrips by the two predators, we conducted leaf disc experiments in agar-þlled ventilated experimental arenas (5 cm in diameter by 3 cm in height) in which a 4-cm-diameter strawberry leaf disc was placed bottom side up on 1% agar just before solidiþcation. All leaf disc experiments were conducted in a growth chamber at 25 1 C, 60 5% RH, and a photoperiod of 16:8 (L:D) h. Live and dead predators and prey were counted after 24 h, and all trials were repeated six times unless otherwise stated. We used Typha sp. pollen in the experiment because we wanted to be conservative in our assessment of the effect of pollen availability on pest suppression by the two predators; Typha pollen should have the strongest negative impact on pest suppression because it is known to be superior pollen type for many omnivorous predators (Shakya et al., 2009; Weintraub et al. 2007), Predation of Western Flower Thrips Adults by O. laevigatus Alone. We used 2Ð3-d-old O. laevigatus adult females that were starved (i.e., offered only moist cotton balls) in isolation for 24 h. Each individual was offered 5, 10, 15, or, 20 western ßower thrips adult, and the number of western ßower thrips consumed was recorded 24 h later. These functional response data were subjected to one-way ANOVA, with block over time effect and prey density as a source of variation in the model (JMP, version 6; Sall et al., 2001). When ANOVA results were signiþcant, means were compared using StudentÕs t-test ( 0.05). Effect of Pollen and Prey Stage on Larval Western Flower Thrips Predation by O. laevigatus. Each starved adult female O. laevigatus was offered 25 Þrst-instar or 25 second-instar western ßower thrips, with or without 1mgofTypha sp. pollen. Live and dead predators and prey were counted after 24 h. The experiment was replicated six times and the number of consumed western ßower thrips larvae was subjected to two-way ANOVA, with pollen at a whole plot level and prey stage at the subplot level (JMP, version 6; Sall et al., 2001). When ANOVA indicated signiþcant main effects, means were compared using StudentÕs t-test ( 0.05). Effect of Pollen on Predation of Immature Western Flower Thrips by N. cucumeris. A single starved predatory mite was offered six Þrst instar western ßower thrips with or without 1 mgoftypha sp. pollen. Predatory mites were held singly without food in the experimental arena for 24 h before adding prey/pollen. The number of prey killed by the predator was recorded 24 h later and the experiment was replicated 10 times. Immature western ßower thrips fed upon by N. cucumeris are distinctive and can easily be differentiated from larval thrips that died from other causes. The number of consumed prey were subjected to one-way ANOVA (JMP, version 6; Sall et al., 2001). Results Influence of Pollen Availability and Predator Activity on Thrips Population and Thrips-Inflicted Fruit Damage. Pollen availability and the two predators affected the number of immature thrips on strawberry plants (pollen: F 1, , P 0.007; Orius mite: F 1, , P 0.002). No adult thrips were found, probably because they were consumed by O. laevigatus or perished naturally. The three factors did not interact signiþcantly in their effects on western ßower thrips (three-way interactions: F 1, , P 0.38). Likewise, no signiþcant differences were found in the combined effects of pollen with each of the predators (pollen Orius: F 1, , P 0.74; pollen mites: F 1, , P 0.36). Yet, western ßower thrips populations were 2.5-fold higher on plants with pollen and no predators than on plants without pollen but in the presence of predatory mites (Fig. 1). Also, western ßower thrips distribution on the plants was affected signiþcantly by the presence of pollen and predators (Fig. 2). In the absence of predators, 31% of western ßower thrips larvae were found on the fruit in the pollenavailable treatment compared with 66% when pollen was absent (Fig. 2). Relatively few western ßower thrips were found on the fruit in the presence of either or both predators, irrespectively of pollen availability (0.1Ð 0.7 thrips per fruit; Fig. 2). The degree of western ßower thrips-inßicted fruit damage differed signiþcantly among treatments but no signiþcant three-way interactions were detected in the effects of pollen, O. laevigatus, and N. cucumeris (F 1, ; P 0.59). There were interactive effects of O. laevigatus and N. cucumeris on fruit damage (F 1, ; P 0.001). Likewise, there were signiþcant interactions in the effects of pollen and O. laevigatus on fruit damage (F 1, ; P 0.006). Yet, pollen and N. cucumeris did not interact in their effect on damage (F 1, ; P 0.18). Overall, fruit damage correlated signiþcantly with western ßower thrips larval density per plant at end of the experiment (Y 4.29X; R , P 0.001), with less damage
4 August 2010 SHAKYA ET AL.: IGP AND PEST MANAGEMENT DECISIONS 1089 Fig. 1. Mean number of western ßower thrips (WFT) larvae (bars SE) recorded on strawberry plants, and thripsinßicted damage to strawberry fruit (dashed line) in different treatment combinations: 0, no damage; 1, light spotting, slight browning of calyx; 2, 25% surface damage (bronzing, punctures); 3, 50% surface damage (bronzing, punctures, surface russeting); 4, 75% surface damage (bronzing, punctures, surface russeting, sucking parts around the achenes); and 5, severe damage. recorded on the fruit of plants with predators, particularly on plants without pollen (Fig. 1). Adjustment of ET. Predation of Western Flower Thrips Adults by O. laevigatus. Predation on western ßower thrips by female O. laevigatus differed signiþcantly among prey densities (F 3, ; P ): this functional response increased linearly up to a density of 10 thrips, after which it remained stable at 12 western ßower thrips per predator in 24 h (Fig. 3). Effect of Pollen and Larval Stage on Western Flower Thrips Predation by O. laevigatus. Prey stage and pollen availability interacted in their effects on the number of prey consumed by the predator (F 1, ; P ) (Fig. 4). Predation on Þrst instar western ßower thrips was signiþcantly higher in the absence of pollen than in its presence. A similar effect was not detected for the second instar prey. Effect of Pollen on Predation of Immature Western Flower Thrips by N. cucumeris. In the presence of pollen, signiþcantly fewer Þrst-instar western ßower thrips were preyed upon in 24 h by N. cucumeris adults than when pollen was absent (F 1, ; P ; and western ßower thrips per 24 h, respectively). Adjustment of ETs. These results were used to modify the ET developed for western ßower thrips in strawberry (Coll et al. 2007). We took a conservative approach and used only 30Ð50% of the predation levels recorded in laboratory experiments (Table 2). For example, results indicate that an O. laevigatus female consumes 15Ð19 and 12Ð24 west- Fig. 2. Mean number of western ßower thrips (WFT) larvae per plant part ( SE) recorded on strawberry fruit, leaves and ßowers in all plants, in the presence and absence of pollen, O. laevigatus, and N. cucumeris.
5 1090 JOURNAL OF ECONOMIC ENTOMOLOGY Vol. 103, no. 4 Table 2. Number of western flower thrips killed by O. laevigatus and N. cucumeris in 24 h, which were used to adjust the economic threshold in a pest management decision-making tool a Western ßower thrips predator No. western ßower thrips killed in the presence of pollen in the absence of pollen 1 O. laevigatus N. cucumeris O. laevigatus 1 N. cucumeris 4 6 a Data are from this study and from Shakya et al. (2009). Fig. 3. Functional response of O. laevigatus females to density of western ßower thrips prey, showing the mean number of prey ( SE) consumed by a predator in 24 h (n 6). ern ßower thrips per day in the presence and absence of pollen, respectively (Figs. 3 and 4). Accordingly, we modiþed the ET by using predation rates of four and six western ßower thrips per predator in the presence and absence of pollen, respectively (Table 2). Likewise, results indicate that N. cucumeris consumes 2 and 3.5 western ßower thrips per day in the presence and absence of pollen, respectively (see data in previous section). We therefore corrected the ET using values of one and two western ßower thrips per day (Table 2). Finally, results presented here and in Shakya et al. (2009) indicate that, in the presence of O. laevigatus, N. cucumeris does not inßict additional mortality on western ßower thrips. We therefore corrected the ET by using the values used for O. laevigatus alone, also for cases where both predators act together (Table 2). We developed a thrips management tool in the shape of a decision ßow-chart (Fig. 5). Parameterization also took into account fruit damage under different conditions (predator association and pollen availability; Fig. 1) and predator distribution pattern on different plant parts (i.e., proportion of predator population in ßowers; Shakya et al. 2009). The inputs needed for the adjustment of the ET are therefore the number of O. laevitatus and N. cucumeris predators per ßower, and the availability of pollen (ßowering or nonßowering plants). These values are to be collected Fig. 4. Mean number of immature western ßower thrips (WFT SE) consumed in 24 h by an adult O. laevigatus in the presence and absence of Typha pollen. weekly, during western ßower thrips monitoring (see Coll et al. 2007). Recommendations for western ßower thrips control measures are then made by comparing thrips density, as determined by ßower inspections, and the adjusted ET (i.e., the output of ßow chart in Fig. 5). Discussion The key pest in strawberries in many parts of the world is western ßower thrips. In Israel, naturally occurring Orius spp. invade pesticide-free Þelds and usually keep western ßower thrips below damaging levels (Coll et al. 2005, 2007). O. laevigatus and N. cucumeris are known to be effective predators of western ßower thrips on various crops when released separately. Two recent studies explored the ability of these two generalist predators to reduce western ßower thrips populations when released together (Skirvin et al. 2007, Shakya et al. 2009). Yet, the importance of these predators in reducing western ßower thrips-inßicted yield losses is being reported here for the Þrst time. In addition, we propose how the activities of these two predators could be incorporated to relax (increase) the ET of western ßower thrips in strawberry. A similar approach could be used to manage other pests in strawberry and other cropping systems. A few studies have explored the western ßower thrips predation capacity of adult O. laevigatus or N. cucumeris. Cocuzza et al. (1997) reported that O. laevigatus consumes approximately seven adult western ßower thrips in 24 h, and Montserrat et al. (2000) reported a satiation level of 9 s instar western ßower thrips in 6 h. Our Þndings are in general agreement with these reports (satiation at 11Ð12 western ßower thrips per d). N. cucumeris has been reported to prey on Þrst-instar F. occidentalis (Cloutier and Johnson 1993) and consume from 3.5 (current study) to 8Ð9 thrips per d (Wright and Williams 1999). Finally, O. laevigatus was reported to prey on N. cucumeris (Wittmann and Leather 1997, Shakya et al. 2009). Some studies suggested that pollen availability may act to retain predators in crop Þelds (van Rijn and Sabelis 1990, Coll and Bottrell 1991). During the winter and spring, strawberries go through several cycles of ßowering and fruit production; so, naturally pollen is alternately available then unavailable.
6 August 2010 SHAKYA ET AL.: IGP AND PEST MANAGEMENT DECISIONS 1091 Fig. 5. Adjustment of ET for western ßower thrips (WFT) in strawberry according to the presence of pollen and thrips predators. Number of thrips and predators (Orius bugs [X], N. cucumeris mites [Y]) per ßower are determined through Þeld sampling. In the absence of predators, the ET for export and local markets are set at 10 and 25 western ßower thrips/ßower (Coll et al. 2007). Because O. laevigatus, N. cucumeris, and western ßower thrips feed and develop on pollen, we hypothesized that the presence of pollen may reduce the level of IGP and predation on thrips by both predators possibly leading to an increased level of thrips-inßicted damage. Shakya et al. (2009) showed that more thrips were found in strawberry ßowers bearing pollen than in those without pollen, regardless of the presence of predators. In the absence of pollen, thrips were recorded primarily on fruit. O. laevigatus primarily inhabits the ßowers when pollen is present, but the leaves and fruit in its absence. When pollen is present, N. cucumeris is found in the ßowers only when O. laevigatus is absent; the mite is an intraguild prey for O. laevigatus. The mites mostly inhabit the fruit or leaves in the presence of O. laevigatus or when pollen is absent. Similarly in greenhouse, Weintraub et al. (2004) reported that in the absence of O. laevigatus, N. cucumeris is found mainly in pepper ßowers. Fitzgerald et al. (2008) reported that 4 wk after being released in the greenhouse and Þeld, signiþcantly more N. cucumeris eggs, immatures and adults were found in strawberry ßowers and fruit clusters than on any other part of the plant. These results and the current study suggest therefore that western ßower thrips and both predators primarily occupy the ßowers when pollen is available. In the absence of predators, western ßower thrips caused signiþcantly higher fruit damage when pollen was absent than in its presence. The reverse was true when both predators were present. These results strongly suggest that the two predators feed on pollen when present and are thus less efþcient in reducing thrips numbers. Results indicate that N. cucumeris is able to reduce fruit damage irrespective of the presence of pollen; however, when O. laevigatus was the only predator, there was less fruit damage in the absence of pollen. It can be concluded that in spite of O. laevigatus feeding on N. cucumeris, thrips and pollen, both predators act to substantially suppress F. occidentalis populations and reduce western ßower thripsinßicted fruit damage. Most agricultural systems have a diverse assemblage of pests, predators, and parasitoids with a multitude of major and minor interactions occurring between consumers at several trophic levels. These complex interactions make it difþcult to establish realistic economic injury levels (EILs). As a result, pest densities alone were traditionally used for recommending control measures. Peterson and Hunt (2003) attempted to develop a probabilistic EIL to account for variability in a system. To date, however, most decision-making tools do not take into account the role natural enemies have in suppressing pest populations (but see Giles et al. 2003; Naranjo and Ellsworth, 2009, and references therein), and antagonistic interactions among natural enemies have been ignored all together in determination of action levels. Results indicate that predator activity may allow us to dramatically relax the ET for western ßower thrips in strawberry ßowers. The presence of an average of a single O. laevigatus per ßower for example, may allow that relaxation of the ET by 40% (from 10 to 14 western ßower thrips per ßower) when pollen is available during the winter (export market). Field monitoring shows that O. laevigatus populations in Israeli strawberry Þelds often reach mean densities of three to four per ßower (Shouster 2003) and that western ßower thrips populations rarely exceeded the calculated ET (Coll et al. 2007). This study shows, for the Þrst time, how consideration of pollen availability and the simultaneous activity of two predators could modify pest man-
7 1092 JOURNAL OF ECONOMIC ENTOMOLOGY Vol. 103, no. 4 agement decisions that may drastically reduce the use of costly and harmful insecticides. Acknowledgments The study was supported in part by CRAFT Project QLK5-CT (BIOPROTECT) from the European Community (to M.C.). References Cited Brown, G. C Simple models of natural enemy action and economic thresholds. Am. Entomol. 43: 117Ð124. Cloutier, C., and G. S. Johnson Interaction between life stages in a phytoseiid predator: western ßower thrips prey killed by adults as food for protonymphs of Amblyseius cucumeris. Exp. Appl. Acarol. 17: 441Ð449. Cocuzza, G. E., P. de Clercq, S. Lizzio, M. van de Veire, L. Tirry, D. Degheele, and V. Vacante Life tables and predation activity of Orius laevigatus and O. albidipennis at three constant temperatures. Entomol. Exp. Appl. 85: 189Ð198. Colfer, R. G., J. A. Rosenheim, L. D. Godfrey, and C. L. Hsu Interactions between the augmentatively released predaceous mite Galendromus occidentalis (Acari: Phytoseiidae) and naturally occurring generalist predators. Environ. Entomol. 32: 840Ð852. Coll, M Living and feeding on plants in predatory Heteroptera, pp. 89Ð129. In M. Coll and J. R. Ruberson [eds.], Predatory Heteroptera: their ecology and use in biological control. Entomological Society of America, Lanham, MD. Coll, M., and D. G. Bottrell Microhabitat and resource selection of the European corn borer (Lepidoptera: Pyralidae) and its natural enemies in Þeld corn. Environ. Entomol. 20: 526Ð533. Coll, M., I. Shouster, and S. Steinberg Removal of a predatory bug from a biological control package facilitated an augmentative program in Israeli strawberry. In Proceedings of the 2nd International Congress of Biological Control of Arthropods, 11Ð16 September 2005, Davos, Switzerland. Publ. FHTET , USDA Forest Service, Morgantown, WV. Coll, M., S. Shakaya, I. Shouster, Y. Nenner, and S. Steinberg Decision-making tools for Frankliniella occidentalis management in strawberry: consideration of target markets. Entomol. Exp. Appl. 122: 59Ð67. Conway, H. E., D. C. Steinkraus, J. R. Ruberson, and T. J. Kring Experimental treatment threshold for the cotton aphid (Homoptera: Aphididae) using natural enemies in Arkansas cotton. J. Entomol. Sci. 41: 361Ð373. Fitzgerald, J., X. Xiangming, N. Pepper, M. Easterbrook, and M. Solomon The spatial and temporal distribution of predatory and phytophagous mites in Þeld-grown strawberry in the UK. Exp. Appl. Acarol. 44: 293Ð306. Giles, K. L., D. B. Jones, T. A. Royer, N. C. Elliot, and S. D. Kindler Development of a sampling plan in winter wheat that estimates cereal aphid parasitism levels and predicts population suppression. J. Econ. Entomol. 96: 975Ð982. Hougardy, E., and N. J. Mills Factors inßuencing the abundance of Trioxys pallidus, a successful introduced biological control agent of walnut aphid in California. Biol. Control 48: 22Ð29. Losey, J. E., and R. F. Denno Positive predator-predator interactions: enhanced predation rates and synergistic suppression of aphid populations. Ecology 79: 2143Ð Montserrat, M., R. Albajes, and C. Castañé Functional response of four heteropteran predators preying on greenhouse whiteßy (Homoptera: Aleyrodidae) and western ßower thrips (Thysanoptera: Thripidae). Environ. Entomol. 29: 1075Ð1082. Musser, F. R., J. P. Nyrop, and A. M. Shelton Integrating biological and chemical controls in decision making: European corn borer (Lepidoptera: Crambidae) control in sweet corn as an example. J. Econ. Entomol. 99: 1538Ð1349. Naranjo, S. E., and P. C. Ellsworth Fifty years of the integrated control concept: moving the model and implementation forward in Arizona. Pest Manag. Sci. 65: 1267Ð1286. Peterson, R.K.D., and T. E. Hunt The probabilistic economic injury level: incorporating uncertainty into pest management decision-making. J. Econ. Entomol. 96: 536Ð542. Rosenheim, J. A., L. R. Wilhoit, and C. A. Armer Inßuence of intraguild predation among generalist insect predators on the suppression of an herbivore population. Oecologia 96: 439Ð449. Rosenheim, J. A., H. K. Kaya, L. E. Ehler, J. J. Marois, and B. A. Jaffee Intraguild predation among biological-control agents: theory and evidence. Biol. Control 5: 303Ð335. Sall, J., A. Lehman, and L. Crighton JMP start statistics: a guide to statistics and data analysis using JMP & JMP IN software, 2nd ed. Duxbury, Thomson Learning, PaciÞc Grove, CA. Shakya, S., P. G. Weintraub, and M. Coll Effect of pollen supplement on intraguild predatory interactions between two omnivores: the importance of spatial dynamics. Biol. Control 50: 281Ð287. Shouster, I Ecological and agricultural implications of tritrophic level interactions between strawberry plants, the western ßower thrips Frankliniella occidentalis, and the predatory bug Orius laevigatus, M.S. thesis, The Hebrew University of Jerusalem, Jerusalem, Israel. Skirvin, D. J., L. Kravar-Garde, K. Reynolds, J. Jones, A. Mead, and J. Fenlon Supplemental food affects thrips predation and movement of Orius laevigatus (Hemiptera: Anthocoridae) and Neoseiulus cucumeris (Acari: Phytoseiidae). Bull. Entomol. Res. 97: 309Ð315. Steiner, M. Y., and S. Goodwin Management of thrips (Thysanoptera: Thripidae) in Australian strawberry crops: within-plant distribution characteristics and action thresholds. Aust. J. Entomol. 44: 175Ð185. Stiling, P Why do natural enemies fail in classical biological control programs? Am. Entomol. 39: 31Ð37. van Rijn, P.C.J., and M. W. Sabelis Pollen as an alternative food source for predatory mites and its effect on the biological control of thrips in greenhouses. Proc. Exp. Appl. Entomol. 1: 44Ð48. Wackers, F. L., J. Romeis, and P. van Rijn Nectar and pollen feeding by insect herbivores and implications for multitrophic interactions. Annu. Rev. Entomol. 52: 301Ð 323. Weintraub, P. G., V. Alchanatis, and E. Palevsky Distribution of the predatory mite, Neoseiulus cucumeris, in greenhouse pepper. Acta Hortic. 659: 281Ð285. Weintraub, P. G., S. Kleitman, V. Alchanatis, and E. Palevsly Factors affecting the distribution of a predatory mite on greenhouse sweet pepper. Exp. Appl. Acarol. 42: 23Ð35.
8 August 2010 SHAKYA ET AL.: IGP AND PEST MANAGEMENT DECISIONS 1093 Whittaker, M. S., and W.D.J. Kirk The effect of photoperiod on walking, feeding, and oviposition in the western ßower thrips. Entomol. Exp. Appl. 111: 209Ð214. Wittmann, E. J., and S. R. Leather Compatibility of Orius laevigatus (Fieber) (Hemiptera: Anthocoridae) with Neoseiulus (Amblyseius) cucumeris (Oudemans) (Acari: Phytoseiidae) and Iphiseius (Amblyseius) degenerans (Berlese) (Acari: Phytoseiidae) in the biocontrol of Frankliniella occidentalis Pergande (Thysanoptera: Thripidae). Exp. Appl. Acarol. 21: 523Ð538. Wright, E., and M.D.C. Williams A bioassay technique to determine the functional response of different predators of Frankliniella occidentalis in ornamentals. Bull. IOBC/wprs 22: 287Ð290. Zhang, W., and S. M. Swinton Incorporating natural enemies in an economic threshold for dynamically optimal pest management. Ecol. Model. 220: Received 4 November 2009; accepted 16 April 2010.
Influence of phytophagous behaviour on prey consumption by Macrolophus pygmaeus
Integrated Control in Protected Crops, Mediterranean Climate IOBC-WPRS Bulletin Vol. 80, 2012 pp. 91-95 Influence of phytophagous behaviour on prey consumption by Macrolophus pygmaeus D. Maselou 1, D.
More informationThe predation of Orius similis to Frankliniella occidentalis and Aphis craccivora
2011 48 3 573 578 * ** 550025 Orius similis 3 ~ 5 HollingⅡ 3 ~ 5 2 5 5 2 E P E = 0. 412P - 1. 623 E = 0. 416P - 1. 639 5 2 5 2 The predation of Orius similis to Frankliniella occidentalis and ZHI Jun-Rui
More informationWhite flies and their natural enemies. Moshe cohen Bio-bee Sde Eliyahu Ltd. October 2015
White flies and their natural enemies Moshe cohen Bio-bee Sde Eliyahu Ltd. October 2015 White flies and their natural enemies: Two species of whiteflies. Attack flowers and vegetables crops: 1.Bemisia
More informationARTHROPOD MANAGEMENT Predator-Prey Interactions Between Orius insidiosus (Heteroptera: Anthocoridae) and Frankliniella tritici
The Journal of Cotton Science 12:195 21 (28) http://journal.cotton.org, The Cotton Foundation 28 195 ARTHROPOD MANAGEMENT Predator-Prey Interactions Between Orius insidiosus (Heteroptera: Anthocoridae)
More informationMinute Pirate Bug: A Beneficial Generalist Insect Predator
Minute Pirate Bug: A Beneficial Generalist Insect Predator Veronica Johnson* and Cerruti R 2 Hooks $ University of Maryland Dept. of Entomology * Graduate student and $ Associate professor and Extension
More informationWestern flower thrips feeding on pollen, and its implications for control
THRIPS AND TOSPOVIRUSES: PROCEEDINGS OF THE 7TH INTERNATIONAL SYMPOSIUM ON THYSANOPTERA 173 Western flower thrips feeding on pollen, and its implications for control Jan Hulshof and Irene Vänninen, Plant
More informationPopulation dynamics of Orius laevigatus and Frankliniella occidentalis: a mathematical modelling approach
Bulletin of Insectology 57 (2): 131-135, 2004 ISSN 1721-8861 Population dynamics of Orius laevigatus and Frankliniella occidentalis: a mathematical modelling approach Giovanni BURGIO 1, Maria Grazia TOMMASINI
More informationTo be an intra-guild predator or a cannibal: is prey quality decisive?
Ecological Entomology (6), 3, 3 36 DOI:./j.365-3.6.8.x To be an intra-guild predator or a cannibal: is prey quality decisive? MARTA MONTSERRAT, ARNE JANSSEN, SARA MAGALHÃES and MAURICE W. SABELIS Institute
More informationCentre de Recherche en Horticulture, Laval University, Quebec, Canada 2
Augmentative releases of predatory mites on papaya in Hawaii 67 AUGMENTATIVE RELEASES OF PREDATORY MITES ON PAPAYA IN HAWAII: FAILURE AND SUCCESS V. Fournier,,2 J.A. Rosenheim, 2 M.W. Johnson, 3 and J.
More informationType of prey influences biology and consumption rate of Orius insidiosus (Say) (Hemiptera, Anthocoridae)
Revista Brasileira de Entomologia 46(1): 99-103 31.III.02 Type of prey influences biology and consumption rate of Orius insidiosus (Say) (Hemiptera, Anthocoridae) Simone M. Mendes 1 Vanda H. P. Bueno 1
More informationUvA-DARE (Digital Academic Repository) What omnivores don't eat Zhang, X. Link to publication
UvA-DARE (Digital Academic Repository) What omnivores don't eat Zhang, X. Link to publication Citation for published version (APA): Zhang, X. (2018). What omnivores don't eat: Nonconsumptive ecological
More informationUvA-DARE (Digital Academic Repository) Biocontrol of western flower thrips by hetereopteran bugs van den Meiracker, R.A.F. Link to publication
UvA-DARE (Digital Academic Repository) Biocontrol of western flower thrips by hetereopteran bugs van den Meiracker, R.A.F. Link to publication Citation for published version (APA): van den Meiracker, R.
More informationFunctional response of the predators mirid bug and wolf spider against white-backed planthopper, Sogatella furcifera (Horvath)
2014; 1(6): 11-16 ISSN 2348-5914 JOZS 2014; 1(6): 11-16 JOZS 2014 Received: 25-10-2014 Accepted: 20-11-2014 N.M.Soomro University of Sindh, Jamshoro, Pakistan M.H.Soomro J.I.Chandio Department of Statistics,
More informationNATURAL ENEMIES OF THRIPS ON AVOCADO
South African Avocado Growers Association Yearbook 1993. 16:105-106 NATURAL ENEMIES OF THRIPS ON AVOCADO W.P. STEYN, W.J. DU TOIT AND MARINDA S. DE BEER Institute for Tropical and Subtropical Crops, Private
More informationSUSCEPTIBILITY OF PREDATORY STINK BUG Podisus nigrispinus (DALLAS) (HETEROPTERA: PENTATOMIDAE) TO GAMMA CYHALOTHRIN
SUSCEPTIBILITY OF PREDATORY STINK BUG Podisus nigrispinus (DALLAS) (HETEROPTERA: PENTATOMIDAE) TO GAMMA CYHALOTHRIN R. R. Coelho 1, A.I.A. Pereira 1, F.S. Ramalho 1, J.C. Zanuncio 2. (1) Unidade de Controle
More informationInsect and other pests in high tunnel vegetables. Gerald Brust IPM Vegetable Specialist
Insect and other pests in high tunnel vegetables Gerald Brust IPM Vegetable Specialist Over the years high tunnel (HT) production of vegetables have enabled growers to extend their vegetable production
More informationFacilitating biological control of insect pests on ornamental crops
Facilitating biological control of insect pests on ornamental crops Robert Hollingsworth Research Entomologist U.S. Pacific Basin Agricultural Research Center 808-959-4349 robert.hollingsworth@ars.usda.gov
More information2 nd International Webinar Conference
2 nd International Sponsored by: 1:00 to 1:25 Eastern DON'T GET TRIPPED BY THRIPS: EFFECTIVE THRIPS MANAGEMENT Ray Cloyd Greenhouse Entomology rcloyd@ksu.edu Overview: What To Expect Introduction Biology,
More informationEgyptian Journal of Biological Pest Control. Atefeh Shahpouri, Fatemeh Yarahmadi * and Nooshin Zandi Sohani
Shahpouri et al. Egyptian Journal of Biological Pest Control (2019) 29:14 https://doi.org/10.1186/s41938-019-0119-7 Egyptian Journal of Biological Pest Control RESEARCH Functional response of the predatory
More informationVegetable Diagnostics 101: Insects and Diseases
Vegetable Diagnostics 101: Insects and Diseases The 2013 Educational Program Committee is pleased to share conference educational materials with you under the condition that they are used without alteration
More informationPotato Aphid, Macrosiphum euphorbiae (Thomas), in Tomatoes: Plant Canopy Distribution and Binomial Sampling on Processing Tomatoes in California
HORTICULTURAL ENTOMOLOGY Potato Aphid, Macrosiphum euphorbiae (Thomas), in Tomatoes: Plant Canopy Distribution and Binomial Sampling on Processing Tomatoes in California NATALIE A. HUMMEL, 1, 2 FRANK G.
More informationPages in the Montana Master Gardener Handbook
Insect Identification Pages 309-326 in the Montana Master Gardener Handbook Integrated Pest Management Integrated Pest Management is an effective and environmentally sensitive approach to pest management
More informationDipartimento di Agraria, Università Mediterranea di Reggio Calabria, Feo di Vito, Sez. di Entomologia Agraria e Forestale, I Reggio Calabria
Alessandra De Grazia 1 and Rita Marullo 1 1 Dipartimento di Agraria, Università Mediterranea di Reggio Calabria, Feo di Vito, Sez. di Entomologia Agraria e Forestale, I-89060 Reggio Calabria Author for
More informationP O L I S H J O U R N A L OF E N T O M O LOG Y. Biological control of thrips pests (Thysanoptera: Thripidae) in a commercial greenhouse in Hungary
P O L I S H J O U R N A L OF E N T O M O LOG Y P O L S K I E P I S M O E N T O M O L O G I C Z N E VOL. 85: 437 451 Lublin 31 December 2016 DOI: 10.1515/pjen-2016-0028 Biological control of thrips pests
More informationOviposition Site Selection by the Spotted Lady Beetle Coleomegilla maculata (Coleoptera: Coccinellidae): Choices Among Plant Species
POPULATION ECOLOGY Oviposition Site Selection by the Spotted Lady Beetle Coleomegilla maculata (Coleoptera: Coccinellidae): Choices Among Plant Species MARISA L. GRIFFIN AND KENNETH V. YEARGAN 1 Department
More informationDr. Oscar E. Liburd. Professor of Fruit & Vegetable Entomology
Dr. Oscar E. Liburd Professor of Fruit & Vegetable Entomology http://entnemdept.ufl.edu/liburd/fruitnvegipm/teaching.htm Lecture 2: Biological Control Biological control is defined as any activity of one
More informationTopics To Cover. A Review of Common Biocontrol Agents For Greenhouse Pests & How to Keep Them Happy. Thrips Predators. Spider Mite Predators
Topics To Cover A Review of Common Biocontrol Agents For Greenhouse Pests & How to Keep Them Happy. Thrips Predators Spider Mite Predators Whitefly Parasitoids Aphid Parasitoids & Predators Bio Brain-iac
More informationMatching commercial thrips predating phytoseids with the highly diversified climatic conditions of different strawberry production systems.
Matching commercial thrips predating phytoseids with the highly diversified climatic conditions of different strawberry production systems. R. Clymans 1, H. Trekels 1, M. Boonen 1, S. Craeye 2, J. Hanssens
More informationWhat is insect forecasting, and why do it
Insect Forecasting Programs: Objectives, and How to Properly Interpret the Data John Gavloski, Extension Entomologist, Manitoba Agriculture, Food and Rural Initiatives Carman, MB R0G 0J0 Email: jgavloski@gov.mb.ca
More informationACCURACY OF MODELS FOR PREDICTING PHENOLOGY OF BLACKHEADED FIREWORM AND IMPLICATIONS FOR IMPROVED PEST MANAGEMENT
ACCURACY OF MODELS FOR PREDICTING PHENOLOGY OF BLACKHEADED FIREWORM AND IMPLICATIONS FOR IMPROVED PEST MANAGEMENT Stephen D. Cockfield and Daniel L. Mahr Department of Entomology University of Wisconsin-Madison
More informationOne predator - two prey systems: Individual behaviour and population dynamics van Maanen, R.
UvA-DARE (Digital Academic Repository) One predator - two prey systems: Individual behaviour and population dynamics van Maanen, R. Link to publication Citation for published version (APA): van Maanen,
More informationPEST AND DISEASE MANAGEMENT
PEST AND DISEASE MANAGEMENT Arthropod Pests The examples of arthropod pests shown here are aphids, spider mites, whiteflies, mealybugs, corn earworm, and tomato hornworm. Aphids Aphids are small, soft-bodied
More informationReproductive Success and Damage Potential of Tobacco Thrips and Western Flower Thrips on Cotton Seedlings in a Greenhouse Environment 1
Reproductive Success and Damage Potential of Tobacco Thrips and Western Flower Thrips on Cotton Seedlings in a Greenhouse Environment 1 Joel C. Faircloth, Julius R. Bradley, Jr., John W. Van Duyn, and
More informationPollen subsidies promote whitefly control through the numerical response of predatory mites Nomikou, M.; Sabelis, M.W.; Janssen, A.R.M.
UvA-DARE (Digital Academic Repository) Pollen subsidies promote whitefly control through the numerical response of predatory mites Nomikou, M.; Sabelis, M.W.; Janssen, A.R.M. Published in: BioControl DOI:
More informationCABI Bioscience, Silwood Park, Ascot, Berks SL5 7TA, UK and current address: Landcare Research, Private Bag , Auckland, New Zealand 3
Systematic & Applied Acarology, (1999) 4, 57-62. Biology of Typhlodromus bambusae (Acari: Phytoseiidae), a predator of Schizotetranychus nanjingensis (Acari: Tetranychidae) injurious to bamboo in Fujian,
More informationBiological traits and predation capacity of four Orius species on two prey species
Bulletin of Insectology 57 (2): 79-93, 24 ISSN 1721-8861 Biological traits and predation capacity of four Orius species on two prey species Maria Grazia TOMMASINI 1, Joop C. VAN LENTEREN 2, Giovanni BURGIO
More informationGrowth damage and silvery damage in chrysanthemum caused by Frankliniella occidentalis is related to leaf food quality
THRIPS AND TOSPOVIRUSES: PROCEEDINGS OF THE 7TH INTERNATIONAL SYMPOSIUM ON THYSANOPTERA 191 Growth damage and silvery damage in chrysanthemum caused by Frankliniella occidentalis is related to leaf food
More informationIG predator. IG prey. Resource SYNTHESIZING INTRAGUILD PREDATION THEORY AND DATA. Short title: Intraguild Predation
Short title: Intraguild Predation SYNTHESIZING INTRAGUILD PREDATION THEORY AND DATA Name/contact: Elizabeth Borer Department of Ecology, Evolution, and Marine Biology University of California Santa Barbara,
More informationGeneral comments about aphid biological control
General comments about aphid biological control Aphid advantages: Rapid colonization (winged forms) followed by rapid reproduction (wingless forms) The aphid s best defense is its reproductive rate Results
More informationDiet of intraguild predators affects antipredator behavior in intraguild prey
Behavioral Ecology doi:10.1093/beheco/arh171 Advance Access publication 13 October 2004 Diet of intraguild predators affects antipredator behavior in intraguild prey Sara Magalhães, Christian Tudorache,
More informationControl of thrips in Allium and Brassica crops
Factsheet 9/11 Field Vegetables Control of thrips in Allium and Brassica crops Rosemary Collier, The University of Warwick The onion thrips (Thrips tabaci) is a pest of several crops in the UK, particularly
More informationIMPORTANCE OF NATURAL ENEMIES FOR STINK BUG CONTROL. Introduction
IMPORTANCE OF NATURAL ENEMIES FOR STINK BUG CONTROL John R. Ruberson 1, Dawn M. Olson 2, Melissa D. Thompson 2, Russell J. Ottens 1, Michael D. Toews 1, Stan Jones 3 and William A. Mills 4 1 Department
More informationPERFORMANCE OF NATURAL ENEMIES REARED ON ARTIFICIAL DIETS J.E. Carpenter 1 and S. Bloem 2 1
Performance of natural enemies reared on artificial diets 143 PERFORMANCE OF NATURAL ENEMIES REARED ON ARTIFICIAL DIETS J.E. Carpenter 1 and S. Bloem 2 1 U.S. Department of Agriculture, Agricultural Research
More informationBiology of sweet potato weevil, Cylas formicarius F. on sweet potato
J. ent. Res., 38 (1) : 53-57 (2014) Biology of sweet potato weevil, Cylas formicarius F. on sweet potato M. Devi *, K. Indira Kumar and R.F. Niranjana Department of Agricultural Entomology, Tamil Nadu
More informationDepartment ofentomology, Wageningen Agricultural University P.O. Box 8031, 6700 EH Wageningen, The Netherlands 2
69 Med. Fac. Landbouww. Univ. Gent, 60/1, 1995 THE INFLUENCE OF FLOWER REFUGIA AND POLLEN ON BIOLOGICAL CONTROL OF WESTERN FLOWER THRIPS, FRANKLIN/ELLA OCCIDENTALIS, BY THE PREDATORY MITE AMBLYSEIUS CUCUMERIS;
More informationDevelopment of test methods and screening for resistance to thrips in Capsicum species
Development of test methods and screening for resistance to thrips in Capsicum species A. Maharijaya, B. Vosman, G. Steenhuis-Broers, R.G.F. Visser, R. E. Voorrips Wageningen UR Plant Breeding, P.O. Box
More informationINFLUENCE OF PREY AVAILABILITY AND INDUCED HOST-PLANT RESISTANCE ON OMNIVORY BY WESTERN FLOWER THRIPS
Ecology, 80(2), 999, pp. 58 523 999 by the Ecological Society of America INFLUENCE OF PREY AVAILABILITY AND INDUCED HOST-PLANT RESISTANCE ON OMNIVORY BY WESTERN FLOWER THRIPS ANURAG A. AGRAWAL, CHRIS KOBAYASHI,
More informationPopulation distribution of thrips, Scirtothrips dorsalis Hood (Thysanoptera: Thripidae) in rose plant within different plant parameters
17; 5(): 1357-131 E-ISSN: 3-77 P-ISSN: 39- JEZS 17; 5(): 1357-131 17 JEZS Received: 5-1-17 Accepted: --17 Jayalaxmi Narayan Hegde Associate Professor (Agril. Entomology), University of Agricultural and
More informationCorresponding author: EUROPEAN ACADEMIC RESEARCH Vol. II, Issue 7/ October Impact Factor: 3.1 (UIF) DRJI Value: 5.
EUROPEAN ACADEMIC RESEARCH Vol. II, Issue 7/ October 2014 ISSN 2286-4822 www.euacademic.org Impact Factor: 3.1 (UIF) DRJI Value: 5.9 (B+) Study of the Predatory Potential of Australian Ladybird Beetle
More informationAgapanthus Gall Midge update (Hayley Jones, Andrew Salisbury, Ian Waghorn & Gerard Clover) all images RHS
Agapanthus Gall Midge update 20.10.2015 (Hayley Jones, Andrew Salisbury, Ian Waghorn & Gerard Clover) all images RHS Background The agapanthus gall midge is an undescribed pest affecting Agapanthus that
More informationPassion Fruit Pests and Their Control
Passion Fruit Pests and Their Control T. Nishida F. H. Haramoto Circular 63 Hawaii Agricultural Experiment Station University of Hawaii December 1964 CONTENTS PAGE Purpose of the circular... 3 Passion
More informationKansas State University Department of Entomology Newsletter
Kansas State University Department of Entomology Newsletter For Agribusinesses, Applicators, Consultants, Extension Personnel & Homeowners Department of Entomology 123 West Waters Hall K-State Research
More informationBIOS 5970: Plant-Herbivore Interactions Dr. Stephen Malcolm, Department of Biological Sciences
BIOS 5970: Plant-Herbivore Interactions Dr. Stephen Malcolm, Department of Biological Sciences D. POPULATION & COMMUNITY DYNAMICS Week 13. Herbivory, predation & parasitism: Lecture summary: Predation:
More informationKey words: Biological parameters, Amphibolus venator Predator, Stored insect pests
Effect of some stored insect pest species on biological aspects of the predator, Amphibolus venator Klug (Hemiptera: Reduviidae) By ATEF A. ABD-ELGAYED AND NARMEN A. YOUSSEF Plant Protection Department,
More informationDevelopment of a Sampling Plan in Winter Wheat that Estimates Cereal Aphid Parasitism Levels and Predicts Population Suppression
SAMPLING AND BIOSTATISTICS Development of a Sampling Plan in Winter Wheat that Estimates Cereal Aphid Parasitism Levels and Predicts Population Suppression KRISTOPHER L. GILES, DOUGLAS B. JONES, TOM A.
More informationDamsel Bug: A smooth-looking slender predator Cerruti R 2 Hooks $, Veronica Johnson* and Alan Leslie +, University of Maryland Dept.
Damsel Bug: A smooth-looking slender predator Cerruti R 2 Hooks $, Veronica Johnson* and Alan Leslie +, University of Maryland Dept. of Entomology $ Associate professor & Extension Specialist, *Graduate
More informationArthropod Containment in Plant Research. Jian J Duan & Jay Bancroft USDA ARS Beneficial Insects Research Unit Newark, Delaware
Arthropod Containment in Plant Research Jian J Duan & Jay Bancroft USDA ARS Beneficial Insects Research Unit Newark, Delaware What we do at USDA ARS BIIRU - To develop biological control programs against
More informationEXPLORING THE RELATIONSHIP AMONG PREDATOR DIVERSITY, INTRAGUILD PREDATION, AND EFFECTIVE BIOLOGICAL CONTROL
Snyder and Straub EXPLORING THE RELATIONSHIP AMONG PREDATOR DIVERSITY, INTRAGUILD PREDATION, AND EFFECTIVE BIOLOGICAL CONTROL William SNYDER and Cory STRAUB Department of Entomology, Washington State University
More informationTowards a system of non-chemical flower Thrips control in strawberry production
Towards a system of non-chemical flower Thrips control in strawberry production Gijs van Kruistum, Applied Plant Research Wageningen UR Seminar WG2, Bioforsk Stjoerdal Norway, Sept. 24, 2013 Current practice
More informationWhitney Cranshaw Colorado State University
Natural and Biological Controls of Shade Tree Insect Pests Whitney Cranshaw Colorado State University Natural Controls Natural Enemies Abiotic (Weather) Controls Topographic Limitations Temperature Extremes
More informationPulse Knowledge. Pea Aphid. Identification and Life Cycle. Host Crops and Crop Injury. Scouting and Economic Thresholds. Jennifer Bogdan, P.Ag.
Pulse Knowledge Pea Aphid Jennifer Bogdan, P.Ag., CCA The pea aphid (Acyrthosiphon pisum (Harris)) is a common insect found wherever pulses are grown in Saskatchewan. Pea aphids cause damage to their host
More informationLecture 8 Insect ecology and balance of life
Lecture 8 Insect ecology and balance of life Ecology: The term ecology is derived from the Greek term oikos meaning house combined with logy meaning the science of or the study of. Thus literally ecology
More informationEvaluation of phytoseiid predators for control of western flower thrips on greenhouse cucumber
BioControl (26) 51:753 768 Ó IOBC 26 DOI 1.17/s1526-6-913-9 Evaluation of phytoseiid predators for control of western flower thrips on greenhouse cucumber Gerben J. MESSELINK*, Sebastiaan E. F. VAN STEENPAAL
More informationUNIVERSITY OF AGRICULTURAL SCIENCES AND VETERINARY MEDICINE CLUJ NAPOCA DOCTORAL SCHOOL ANCA DAFINA COVACI SUMMARY. PhD THESIS
UNIVERSITY OF AGRICULTURAL SCIENCES AND VETERINARY MEDICINE CLUJ NAPOCA DOCTORAL SCHOOL ANCA DAFINA COVACI SUMMARY OF PhD THESIS Research on biology, ecology and integrated management of Thysanoptera species
More informationBanana t hri p s i n t he We s t I ndi e s
Thrips are tiny (1-2 mm), slender insects with typical long fringes on the margins of their narrow wings. Adults may cause major damage by puncturing the fruit epidermis to suck out the contents. The fruit
More information6 2 Insects and plants
6 2 Insects and plants Insect DIY 1. Find plant habitat 2. Find plant 3. Accept plant 4. Eat survive, reproduce Plant characteristics Shape structure Mechanical defenses trichomes Chemical defenses sap,
More informationOccurrence of diapause in Orius laevigatus
Bulletin of Insectology 56 (2): 225-251, 23 ISSN 1721-8861 Occurrence of diapause in Orius laevigatus Maria Grazia TOMMASINI 1, Joop C. VAN LENTEREN 2 1 CRPV, Diegaro di Cesena (FC), Italy 2 Laboratory
More informationEfficacy of Commercially Available Invertebrate Predators against Drosophila suzukii
Insects 2014, 5, 952-960; doi:10.3390/insects5040952 Article OPEN ACCESS insects ISSN 2075-4450 www.mdpi.com/journal/insects/ Efficacy of Commercially Available Invertebrate Predators against Drosophila
More informationCannabis Pests and the Insects That Eat Them!
Cannabis Pests and the Insects That Eat Them First Sign of Effective Predatory Insects Aphids wilted -looking plants that aren t thriving Pear shaped bodies, Tiny cornicles or dual exhaust pipes at the
More informationFunctional benefits of predator species diversity depend on prey identity
Ecological Entomology (2005) 30, 497 501 Functional benefits of predator species diversity depend on prey identity A. WILBY 1, S. C. VILLAREAL 2,L.P.LAN 3,K.L.HEONG 2 and M. B. THOMAS 1 1 Department of
More informationIdentifying Thrips & Their Damage in New England Greenhouses
Identifying Thrips & Their Damage in New England Greenhouses Cheryl Frank and Alan Eaton University of Vermont and University of New Hampshire Cooperative Extension January 2016 Thrips (Order: Thysanoptera)
More informationGypsy Moth Defoliation Harpers Ferry, Va
Gypsy Moth Defoliation Harpers Ferry, Va Common Bad Bugs Eastern Tent Caterpillar Bagworm Japanese Beetles Aphids Scale Insects Borers Eastern Tent Caterpillar Bagworm Japanese Beetles Aphids Soft Scales
More informationFINAL REPORT TO MICHIGAN DEPARTMENT OF AGRICULTURE AND RURAL DEVELOPMENT HORT FUND PROJECT FY 2015
FINAL REPORT TO MICHIGAN DEPARTMENT OF AGRICULTURE AND RURAL DEVELOPMENT HORT FUND PROJECT FY 2015 PROJECT TITLE: Producing Nursery and Greenhouse Plans in Michigan that are Safer for Pollinators in the
More informationBiological Control 37 (2006)
Biological Control 37 (2006) 314 319 control as an alternative control method has attracted much attention recently. Anthocorid bugs and phytoseiid mites are already used for successfully controlling thrips
More informationIR-4 ORNAMENTAL DATA REPORTING FORM
IR-4 ORNAMENTAL DATA REPORTING FORM 1. INVESTIGATOR (Name, Address, Phone#):Betsy Anderson / Dr. Michael Reding, USDA-ARS, Application Technology Research Unit, 1680 Madison Ave., Wooster, Ohio 44691 (330)
More informationSeveral non-insects, near insects and possible insect pests
Several non-insects, near insects and possible insect pests by Dr.Richard Lindquist OARDC Dept. of Entomology The Ohio State University Several non-insects, near insects and possible insects (depending
More informationRelative Performance of Different Colour Laden Sticky Traps on the Attraction of Sucking Pests in Pomegranate
International Journal of Current Microbiology and Applied Sciences ISSN: 2319-7706 Volume 6 Number (2017) pp. 2997-3004 Journal homepage: http://www.ijcmas.com Original Research Article https://doi.org/10.20546/ijcmas.2017.6.350
More informationDectes Stem Borer: A Summertime Pest of Soybeans
Dectes Stem Borer: A Summertime Pest of Soybeans Veronica Johnson* and Cerruti R 2 Hooks $ University of Maryland Dept. of Entomology * Graduate student and $ Associate professor and Extension Specialist
More informationHOST PREFERENCE AND LIFE CYCLE PARAMETERS OF CHROMATOMYA HORTICOLA GOUREAU (DIPTERA: AGROMYZIDAE) ON CANOLA CULTIVARS
Mun. Ent. Zool. Vol. 5, No. 1, January 2010 247 HOST PREFERENCE AND LIFE CYCLE PARAMETERS OF CHROMATOMYA HORTICOLA GOUREAU (DIPTERA: AGROMYZIDAE) ON CANOLA CULTIVARS Seyed Ali Asghar Fathi* * Department
More informationInvestigating Use of Biocontrol Agents to Control Spotted Knapweed
Investigating Use of Biocontrol Agents to Control Spotted Knapweed Target Grade Level: 5 th Created and Adapted by: Rachel Loehman UNIVERSITY OF MONTANA GK-12 PROGRAM 1 Investigating Use of Biocontrol
More informationImpact of Tobacco Thrips on Cowpea
2012 Plant Management Network. Accepted for publication 10 September 2012. Published. Impact of Tobacco Thrips on Cowpea Paul McLeod, Department of Entomology, University of Arkansas, Fayetteville, AR
More informationManaging stink bugs through cultural practices
Managing stink bugs through cultural practices Rachael Long, Farm Advisor, UC Cooperative Extension Yolo, Solano, Sacramento Counties, http://ceyolo.ucanr.edu Common stink bugs: Southern green (Africa
More informationStrategies to Optimize Thrips Control in the Klamath Basin
Strategies to Optimize Thrips Control in the Klamath Basin Steve Orloff, Farm Advisor, Siskiyou County Larry Godfrey, Entomology Specialist, UCD Rob Wilson, IREC Director Funded by CGORAB Thrips feed by
More informationRisk Assessment Models for Nontarget and Biodiversity Impacts of GMOs
Risk Assessment Models for Nontarget and Biodiversity Impacts of GMOs There are many ways to conduct an ecological risk assessment Alternative ERA models Ecotoxicology model Total biodiversity model Functional
More informationPopulation dynamics of thrips prey and their mite predators in a refuge
Oecologia (27) 15:557 568 DOI 1.17/s442-6-548-3 POPULATION ECOLOGY Population dynamics of thrips prey and their mite predators in a refuge Sara Magalhães Æ Paul C. J. van Rijn Æ Marta Montserrat Æ Angelo
More informationThe Impact of Food Resources on Fitness of Episyrphus Balteatus
International Journal of Advances in Scientific Research and Engineering (ijasre) E-ISSN : 2454-8006 DOI: http://dx.doi.org/10.7324/ijasre.2018.32644 Volume 4, Issue 3 March - 2018 The Impact of Food Resources
More informationPollen Feeding and Fitness in Praying Mantids: The Vegetarian Side of a Tritrophic Predator
PLANT-INSECT INTERACTION Pollen Feeding and Fitness in Praying Mantids: The Vegetarian Side of a Tritrophic Predator NOELLE BECKMAN AND LAWRENCE E. HURD Department of Biology, Washington &Lee University,
More information1. Introduction to scales 1. The Hemiptera (True bugs) 2. How bugs got their name 3. Difference between Heteroptera and Homoptera 4.
1. Introduction to scales 1. The Hemiptera (True bugs) 2. How bugs got their name 3. Difference between Heteroptera and Homoptera 4. Major scale families 5. Parts of a scale 6. Scale life cycles 2. Biology
More informationResource-Dependent Giving-Up Time of the Predatory Mite, Phytoseiulus persimilis
Journal of Insect Behavior, Vol. 19, No. 6, November 2006 ( C 2006) DOI: 10.1007/s10905-006-9059-7 Resource-Dependent Giving-Up Time of the Predatory Mite, Phytoseiulus persimilis Punya Nachappa, 1 David
More informationGarlic Mustard Biocontrol An Update. Jeanie Katovich, Esther Gerber, Hariet Hinz, Luke Skinner, David Ragsdale and Roger Becker
Garlic Mustard Biocontrol An Update Jeanie Katovich, Esther Gerber, Hariet Hinz, Luke Skinner, David Ragsdale and Roger Becker Ceutorhynchus scrobicollis McCornack C. scrobicollis Life Cycle Summer Adult
More informationPlanting Date Influence on the Wheat Stem Sawfly (Hymenoptera: Cephidae) in Spring Wheat 1
Planting Date Influence on the Wheat Stem Sawfly (Hymenoptera: Cephidae) in Spring Wheat 1 Wendell L. Morrill and Gregory D. Kushnak 2 Department of Entomology, Montana State University, Bozeman, Montana
More informationGrowth and development of Earias vittella (Fabricius) on cotton cultivars
J. Cotton Res. Dev. 30 (1) 121-126 (January, 2016) Growth and development of Earias vittella (Fabricius) on cotton cultivars R. P. DONGARJAL AND V.K. BHAMARE* Vasantrao Naik Marathwada Krishi Vidyapeeth,
More informationPOPULATION DYNAMICS OF CHILLI THRIPS, Scirtothrips dorsalis HOOD IN RELATION TO WEATHER PARAMETERS BAROT, B.V., PATEL, J.J.* AND SHAIKH, A. A.
POPULATION DYNAMICS OF CHILLI THRIPS, Scirtothrips dorsalis HOOD IN RELATION TO WEATHER PARAMETERS BAROT, B.V., PATEL, J.J.* AND SHAIKH, A. A. MAIN VEGETABLE RESEARCH STATION ANAND AGRICULTURAL UNIVERSITY,
More informationPredatory bugs show higher abundance close to flower strips in pear orchards
Predatory bugs show higher abundance close to flower strips in pear orchards Karin Winkler 1,2, Herman Helsen 2 & Bishnu Hari Devkota 2,3 1Netherlands Institute for Ecological Research (NIOO-KNAW), Heteren,
More informationWhat omnivores eat: direct e ects of induced plant resistance on herbivores and indirect consequences for diet selection by omnivores
Ecology 2000, 69, What omnivores eat: direct e ects of induced plant resistance on herbivores and indirect consequences for diet selection by omnivores ANURAG A. AGRAWAL* and CORINNE N. KLEIN Department
More informationEffect of Weather Parameters on Population Dynamics of Paddy Pests
International Journal of Current Microbiology and Applied Sciences ISSN: 2319-7706 Volume 6 Number 10 (2017) pp. 2049-2053 Journal homepage: http://www.ijcmas.com Original Research Article https://doi.org/10.20546/ijcmas.2017.610.243
More informationBiological Control of the Banana Skipper,
Vol. XXIII, No. 2, February 1980 231 Biological Control of the Banana Skipper, Pelopidas thrax (Linnaeus), (Lepidoptera: Hesperiidae) in Hawaii1 Ronald F.L. Mau2, Kenneth Murai3, Bernarr Kumashiro3, and
More informationIdentifying the Good, the Bad & the Ugly
Identifying the Good, the Bad & the Ugly Cheryl Frank Sullivan & Margaret Skinner ~ Univ. of Vermont, Entomology Research Laboratory Anna Wallingford ~ Univ. of NH Extension Carol Glenister ~ IPM Laboratories,
More informationGREEN LIFE. Plants and Photosynthesis W 398
W 398 GREEN LIFE Plants and Photosynthesis Savannah Webb, Former 4-H Extension Agent, Maury County Jennifer Richards, Assistant Professor, 4-H Youth Development MANAGEMENT OF APHIDS AND BYD IN TENNESSEE
More informationEffect of temperature on development of the Western Flower Thrips, Frankliniella occidentalis (Thysanoptera: Thripidae)
NOTE Eur. J. Entomol. 95: 301-306, 1998 ISSN 1210-5759 Effect of temperature on development of the Western Flower Thrips, Frankliniella occidentalis (Thysanoptera: Thripidae) Jamie R. McDONALD', Jeffrey
More information