Taro virus survey Tonga 2-6 July 2002
|
|
- Rudolph Simmons
- 5 years ago
- Views:
Transcription
1 Taro virus survey Tonga 2-6 July 2002 Introduction This brief report by Peter Revill and Grahame Jackson summarises fieldwork in Tonga on taro viruses. The Queensland University of Technology is carrying out a regional survey in support of research commissioned by ACIAR to detect, isolate and develop indexing methods for taro viruses to facilitate the international transfer of germplasm. The project works in collaboration with TaroGen, a project funded by AusAID to conserve taro in Pacific Island countries and breed for resistance to leaf blight. Taro appears to have had a renaissance in Tonga in the wet years since the last El Nino and much is now grown. The dominant variety is Lau ila, (Dalo ni Tonga in Fiji). This variety is very susceptible to taro leaf blight so there is need to consider how the industry can be safeguarded from this disease, other than by quarantine regulations prohibiting the unrestricted movement of planting material from countries where the fungus is present. Farmers appear to have little knowledge of the disease or the devastation is caused in Samoa following its introduction in Tongatapu The only virus-like symptoms seen on Colocasia were those of DsMV, which were invariably present, although not common, and 1-2 mm chlorotic spots on breeders lines at Vaini Research Station of unknown cause. Typically, plants with DsMV had feather-like patterns along veins, but no distortions. Similar symptoms were found on young plants of an eddo (sato imo type) introduced by Afeaki from Japan and growing under irrigation near Vaini. Some of these plants also showed a faint mottle. Symptoms of DsMV were also found on Alocasia, mostly as indistinct patches of chlorosis, more common in the central region than the margins (see Fig. 3). Fig. 1 Symptoms of DsMV associated with marginal distortions, near Vaini Fig. 2 Xanthosoma with diffuse feather-like patterns along main and secondary veins, Tatakamotonga, Tongatapu Symptoms possibly caused by DsMV were more varied in Xanthosoma than in the other species. They ranged from typical feather patterns, with or without marginal distortions (Fig. 1 & 2), to more unusual ring spots (seen also in Vanuatu). Some
2 plants showed little leaf symptoms, but there was no evidence that these were associated with DsMV, and may have been caused by herbicide. Vava u Taro were inspected at the MAF station Fatai and in the following villages: Mataika, Leimatu a, Maiva, Tefisi and Longomapu. DsMV was found in Colocasia, commonly in Alocasia, but more rarely in Xanthosoma. Interestingly, Alocasia invariably showed symptoms of DsMV, in contrast to the other species, with indistinct patterns along the main veins, especially in the centre of the leaves (Fig. 3). In rare instances, bright feather-like patterns were seen on stunted, unfurled, twisted leaves (Fig. 5). However, it appeared that the leaves expanded normally, but remained short. Leaves emerging later appeared healthy. However, Soane Taula (Research Officer, MAF) said that these plants invariably died at maturity. At Leimatu a, leaves of Alocasia also showed large irregular blotch patterns, more obvious on leaves facing the sun and viewed from the underside (Fig. 5). This is the first time that such symptoms have been reported from Alocasia in Tonga or elsewhere. Fig. 3 Typical DsMV symptoms in Alocasia: diffuse patterns at the centre of the leaf Fig. 4 Distorted, stunted Alocasia leaf, with DsMV feathering, Leimatu a, Vava u Fig.5 Underside of Alocasia leaf with chlorotic patterns, Leimatu a, Vava u Fig. 6 Kava showing collapse of terminal shoot (arrowed), Vaini, Tongatapu
3 Other diseases Kava wilt Kava dieback was seen at two locations, near Vaini Research Station, Tongatapu and at MAF station, Fatai. Plants at Vaini showed a conspicuous stem break some 30 cm from the shoot tip (Fig. 6), accompanied by internal necrosis. Symptoms on Vava u were like those seen on kava of a similar variety in Fiji. Stems appeared to be defoliating and dying back, but not breaking as at Vaini. However, in both cases, mosaics, mottles and vein clearing could be found on the younger leaves. Marginal necrosis Xanthosoma, Tongatapu Near Vaini, Xanthosoma were seen with a severe marginal chlorosis that extended several cms to the centre of the leaf (Fig. 7). A similar problem has been noted on Colocasia in New Caledonia thought to be caused by Cladosporium. It is more likely to be an infection cause by Xanthomonas. Attempts to isolate the bacterium should be made in Tonga. Fig. 7 Marginal necrosis in Xanthosoma, possibly caused by bacterial infection, Vaini district Banana wilt Leimatu a (Sine Nafe) Several rows of plantains about 2-3-months-old were wilting (Fig. 8 & 9). They were taken from an adjacent block of older plants, some of which were showing similar symptoms. On one, the emerging leaf was still furled, torn and appeared to have stopped growing. Four of the younger plants were dug up and examined. There were no internal symptoms, except for weevil (Cosmopolites) infection in one plant. The lateral roots were decayed, but the cause of the problem was not obvious, and isolations are needed. One of the plants had symptoms similar to Radopholus on the outside of the bole, but the wilt is not likely to be caused by this nematode. Another possibility is Marasmiellus inoderma, but this seems unlikely too, especially as it has been dry in Vava u in recent months.
4 Fig. 6 A row of 2-3 month-old wilted banana plants (plantain variety) at Leimatu a, Vava u Fig. 7 Banana wilt at Leimatu a, Vava u showing wilt of lower leaves Pratylenchus in Dioscorea alata Farmers may not recognise symptoms of Pratylenchus coffeae on yam planting setts and are unwittingly spreading the nematode. They need information on the importance of the nematode, and the need to remove infections prior to planting. In one field inspected at the time of planting (owned by a member of MAF), infected setts were common (Fig 8). Fig. 8 Pratylenchus infection (arrowed) in planting setts of Dioscorea alata Acknowledgements We would like to thank the following for their assistance during the mission: we are particularly grateful for the assistance of Pita Taufatofua, Deputy Director, MAF, for arrangements, and to those who accompanied us on Tongatapu and Vava u. Pita Taufatofua, Deputy Director and Head of Research-Extension Division Lampetti Havea, Principle Agricultural Officer, Eastern District, Nulu alofa To ifalefehi Moala, Senior Agricultural Officer, Western District, Nulu alofa Paelata Vi Nai, Senior Agricultural Officer, Nulu alofa Sela Tupouniua, Senior Plant Pathologist, Nulu alofa Luseane Taufa, Senior Agricultural Officer, Nulu alofa Leody Vainikolo, Officer in charge, Vava u
5 Soane Taula, Senior Agricultural Officer, Vava u Hema Tu uheava, Extension Officer, Vava u Afeaki, Executive Chairman, Lau Lava Ltd, Nulu alofa
Unit D: Controlling Pests and Diseases in the Orchard. Lesson 5: Identify and Control Diseases in the Orchard
Unit D: Controlling Pests and Diseases in the Orchard Lesson 5: Identify and Control Diseases in the Orchard 1 Terms Abiotic disease Bacteria Biotic diseases Cultural disease control Disease avoidance
More informationDiseases of Sesame. Dr. S. Parthasarathy, M.Sc. (Ag)., Ph.D., FBSS.
Diseases of Sesame Dr. S. Parthasarathy, M.Sc. (Ag)., Ph.D., FBSS. Assistant Professor (Plant Pathology), Dept. of Plant Pathology, College of Agricultural Technology, Theni Diseases of Sesame Charcoal
More informationCm W)aøs A.3.1. Blast (Pyricularia grisea) Description: The disease caused by fungal infection.
A.3. Diseases A.3.1. Cm W)aøs Blast (Pyricularia grisea) Picture 100 : Leaf blast. Description: The disease caused by fungal infection. Leaf blast: An infected leaf has diamond shaped or elliptical or
More informationthe final stage, the plant may be topped with tufts of small green leaves on blackened stems.
GERANIUM DISORDERS Joseph J. Maisano, Jr. Cooperative Extension Horticultural Agent Geraniums are plagued by a number of diseases caused by bacteria, fungi, viruses and unfavorable environmental conditions.
More informationUnit G: Pest Management. Lesson 2: Managing Crop Diseases
Unit G: Pest Management Lesson 2: Managing Crop Diseases 1 Terms Abiotic disease Bacteria Biotic disease Cultural disease control Disease avoidance Disease resistance Disease tolerance Fungi Infectious
More informationBasic Plant Pathology for Franklin County Master Gardener Volunteers. Nancy J. Taylor Plant Pathology Department Ohio State University
Basic Plant Pathology for Franklin County Master Gardener Volunteers Nancy J. Taylor Plant Pathology Department Ohio State University https://www.youtube.com/watch?v=h4 PuP_QbD14 Mildews Mildews Mildews
More informationPlant Disease Introduction. Larry A. Sagers Utah State University Extension Regional Horticulturist
Plant Disease Introduction Larry A. Sagers Utah State University Extension Regional Horticulturist Plant Pathology Basics Disease Anything that interferes with normal plant function Plant Pathology Basics
More informationCertified Arborist. Diagnosis and Plant Disorders. What is a healthy plant?
Certified Arborist Diagnosis and Plant Disorders What is a healthy plant? Vitality Ability to deal with stress Vigor Genetic ability to deal with stress 1 Many things combine to cause decline! Plant Health
More informationCryotherapy: A New Method to Eliminate Pathogens from Sweetpotato Propagation Materials
Cryotherapy: A New Method to Eliminate Pathogens from Sweetpotato Propagation Materials Margaret Worthington Graduate Group in Horticulture and Agronomy University of California, Davis April 14, 2009 http://www.judithbarathart.com
More informationRose Black spot-diplocarpon rosae
Issue 20-July 16, 2013 This bulletin from the Cooperative Extension Plant Health Clinic (Plant Disease Clinic) is an electronic update about diseases and other problems observed in our lab each month.
More information4. AMARYLLID CULTURE NARCISSUS DISEASES I REGIONAL ADAPTATION, SOILS, FERTILIZATION IRRIGATION, USE IN LANDSCAPE, DISEASE AND INSECT CONTROL, ETC.
4. AMARYLLID CULTURE I REGIONAL ADAPTATION, SOILS, FERTILIZATION IRRIGATION, USE IN LANDSCAPE, DISEASE AND INSECT CONTROL, ETC. NARCISSUS DISEASES CHARLES J. GOULD The narcissi or daffodils grown in commercial
More informationThroughout my more than 30 years
pests & diseases Sometimes Diagnosis Is Simple While it s always preferable to have diseases professionally identified in a lab, there are some basic guidelines to help growers diagnose their plants issues.
More informationPROPOSED SAFFLOWER CULTIVARS FOR CONSIDERATION AT
PROPOSED SAFFLOWER CULTIVARS FOR CONSIDERATION AT THE 2007 VARIETY RELEASE AND RECOMMENDATION MEETING 95B 3538 Safflower Submitted by Jerald W. Bergman, Safflower Breeder Eastern Agricultural Research
More informationPlant Disease Introduction
Utah State University DigitalCommons@USU All Archived Publications Archived USU Extension Publications 6-30-2006 Plant Disease Introduction Larry A. Sagers Utah State University Follow this and additional
More informationDiagnosing Plant Problems. A strategy to get started
+ Diagnosing Plant Problems A strategy to get started + Causes of plant damage Living factors Pests such as insects, mites, rodents, mammals Pathogens that cause disease such as fungi, bacteria, viruses,
More informationBoxwood Blight. Enhanced First Detector Training
Boxwood Blight Enhanced First Detector Training Boxwood Blight Presented by Margery Daughtrey Cornell University, LIHREC Boxwood blight Potential impact Pathways Identification & pathogen biology Hosts
More informationPROTOCOL FOR DISTINCTNESS, UNIFORMITY AND STABILITY TESTS
PROTOCOL FOR DISTINCTNESS, UNIFORMITY AND STABILITY TESTS Gaura L. GAURA UPOV Species Code: GAURA Adopted on 21/03/2012 Entry into force on 21/03/2012 1 I SUBJECT OF THE PROTOCOL The protocol describes
More informationWhat is a plant disease?
Master Gardener Intern Training Basic plant pathology Kevin Ong, PhD. Associate Professor and Extension Plant Pathologist Director Texas Plant Disease Diagnostic Laboratory College Station, TX What is
More informationMaster Gardener - Plant Pathology
Master Gardener - Plant Pathology How do I enroll in the online course? 1. Go to http://learnonline.agrilife.org and look to the top right to find a login box. If you do have an account then log in with
More informationBasics of Plant Pathology. Pam Roberts Katherine Hendricks Southwest Florida Research and Education Center
Basics of Plant Pathology Pam Roberts Katherine Hendricks Southwest Florida Research and Education Center Historical Significance of Plant Diseases Sri Lanka France Late Blight on potato caused the Irish
More informationExchanging Materials in Plants
Exchanging Materials in Plants 1 of 23 Boardworks Ltd 2012 2 of 23 Boardworks Ltd 2012 3 of 23 Boardworks Ltd 2012 All living things need to exchange materials Plants need to obtain certain materials for
More informationPlant Pathology Fact Sheet
Plant Pathology Fact Sheet PP-22 Selerotinia Diseases of Vegetable and Field Crops in Florida Ken Pernezny and L. H. Purdy, Professor, Everglades Research and Education Center, Belle Glade; and Professor,
More informationIt is one of the most serious oak diseases in the United States, killing thousands of trees each year.
1 Oak Wilt is the disease caused by the pathogenic non-native fungus Ceratocystis fagacearum that affects oaks. Oaks in the red oak group (those with sharply pointed tips- like pin oak and red oak) are
More informationWelcome to the Iowa Certified Nursery Professional Training program Module 7: Introduction to Plant Diseases and Insects.
Welcome to the Iowa Certified Nursery Professional Training program Module 7: Introduction to Plant Diseases and Insects. 1 After completing this module you should: 1. Understand the causes of abssiotic
More informationResearch and Reviews: Journal of Botanical Sciences
Research and Reviews: Journal of Botanical Sciences e-issn: 2320-0189 Illness Detection on Cotton Leaves by Gabor Wavelet. Afshin shaabany*, and Fatemeh Jamshidi Department of Electrical Engineering, University
More informationEstimates of Variability for Growth and Yield Attributes in Taro (Colocasia esculenta var. Antiquorum (L.) Schott)
International Journal of Current Microbiology and Applied Sciences ISSN: 2319-7706 Volume 6 Number 8 (2017) pp. 1282-1286 Journal homepage: http://www.ijcmas.com Original Research Article https://doi.org/10.20546/ijcmas.2017.608.155
More informationAugust 2014 Climate Summary. Rainfall Outlook and Drought Update for October - December 2014
METEOROLOGY DIVISION MINISTRY OF CLIMATE CHANGE, ENERGY, DISASTER MANAGEMENT, METEOROLOGY, INFORMATION & COMMUNICATIONS. KINGDOM OF TONGA Climate Update for Tonga August Climate Summary Rainfall Outlook
More informationBy the end of this lesson, you should be able to
Allelopathy 1 Allelopathy By the end of this lesson, you should be able to define allelopathy explain the difference between allelopathy and competition identify the key interactions in allelopathy provide
More informationPlant disease. Plant Diseases: Learning objectives: Plant Disease: Any physiological or structural abnormality that is harmful to the plant
Plant disease Plant Diseases: Identification and Control Melodie Putnam Extension Plant Pathologist Learning objectives: Difference between biotic and abiotic diseases and their manifestation Difference
More informationTomato Spotted Wilt Virus (TSWV) Information and Control Strategies
Tomato Spotted Wilt Virus (TSWV) Information and Control Strategies Craig H. Canaday Dept. of Entomology and Plant Pathology The University of Tennessee West Tennessee Research and Education Center (WTREC)
More informationField Guide to African Soybean Diseases and Pests
Introduction Field Guide to African Soybean Diseases and Pests Glen Hartman Harun Muthuri Murithi An electronic copy of this guide is available at: http://soybeaninnovationlab.illinois.edu/soybeandisease-diagnostic-guide
More informationStudent Name: Teacher: Date: Test: 9_12 Agriculture AP41 - Horticulture I Test 2 Description: Pest Management District: Wake County Form: 501
Student Name: Teacher: Date: Test: 9_12 Agriculture AP41 - Horticulture I Test 2 Description: Pest Management District: Wake County Form: 501 1. Aimee uses traps in her garden to: 2. Which is MOST true
More informationWhy Calcium is So Important
Why Calcium is So Important Calcium - A Transportation Problem By Dr. Lynette Morgan As hydroponic growers we like to think that by supplying our plants with all the nutrients they need in the right ratios,
More informationThe impact of Agrobacterium tumefaciens and other soil borne disease causing agents of economic importance in production of roses
The impact of Agrobacterium tumefaciens and other soil borne disease causing agents of economic importance in production of roses Video conference on global competitiveness of the flower industry in the
More informationResearch Notes: G. B. Pant University of Agriculture and Technology
Volume 1 Article 6 4-1-1974 Research Notes: G. B. Pant University of Agriculture and Technology G. B. Pant University of Agriculture and Technology G. B. Pant University of Agriculture and Technology G.
More informationCold damage to blueberry flowers affect fruit set of the plant causing reduction in fruit yield can be devastating (2007)
Limb dieback and leaf scorch of a Japanese Maple caused by cold damage to new growth in the spring, followed by extreme drought conditions in Georgia (2007) caused by a non-living factor Cold damage to
More informationNorth American Bramble Growers Research Foundation 2016 Report. Fire Blight: An Emerging Problem for Blackberry Growers in the Mid-South
North American Bramble Growers Research Foundation 2016 Report Fire Blight: An Emerging Problem for Blackberry Growers in the Mid-South Principal Investigator: Burt Bluhm University of Arkansas Department
More informationTHE IRON-CHLOROPHYLL RELATEONSHIP IN YOUNG HASS AVOCADO LEAVES
Proc. Fla. State Hort. Soc. 83:372-375. 1970. THE IRON-CHLOROPHYLL RELATEONSHIP IN YOUNG HASS AVOCADO LEAVES E. F. Wallihan and R. G. Sharpless University of California, Riverside ABSTRACT Young summer
More information2016 Soybean Vein Necrosis Disease Survey
216 Soybean Vein Necrosis Disease Survey Nathan Kleczewski Ph.D. Extension Plant Pathologist Bill Cissel Extension IPM Agent University of Delaware Cooperative Extension Soybean Vein Necrosis Disease (SVND)
More informationDocument category: There is no restriction on the circulation of this document
GA2-06 Agenda Item 2 Issued: 16 January 2018 CIMMYT Position on gene editing: An example to support the development of a common position on gene editing Purpose This document provides CIMMYT s Position
More informationEffects of Sun-Blotch on the Anatomy of the Avocado Stem
California Avocado Association 1935 Yearbook 20: 125-129 Effects of Sun-Blotch on the Anatomy of the Avocado Stem Charles A. Schroeder Because of the comparatively recent discovery of the avocado disease
More informationTodd A.Steinlage, Alaska Department of Natural Resources, Division of Agriculture, Plant Materials Center
Tomato Spotted Wilt Virus in Alaska Greenhouses and Nurseries Todd A.Steinlage, Alaska Department of Natural Resources, Division of Agriculture, Plant Materials Center Tomato spotted wilt virus (TSWV)
More informationClimate Forecasting the Southwest Pacific experience. Dr Jim Salinger, National Institute of Water and Atmospheric Research, Auckland, New Zealand
Climate Forecasting the Southwest Pacific experience Dr Jim Salinger, National Institute of Water and Atmospheric Research, Auckland, New Zealand Climate Prediction in the South Pacific The Island Climate
More informationbelonging to the Genus Pantoea
Emerging diseases of maize and onion caused by bacteria belonging to the Genus Pantoea by Teresa Goszczynska Submitted in partial fulfilment of the requirements for the degree Philosophiae Doctoriae in
More informationPlants Get Sick Too! An Introduction to Plant Diseases. Sarah D. Ellis Michael J. Boehm Department of Plant Pathology
FACT SHEET Agriculture and Natural Resources PP401.01 This is the first fact sheet in a series of ten designed to provide an overview of key concepts in plant pathology. Plant pathology is the study of
More informationMORPHOLOGICAL, CULTURAL AND PATHOGENIC CHARACTERISTICS OF MACROPHOMINA PHASEOLINA ISOLATES FROM SUGAR BEET
MORPHOLOGICAL, CULTURAL AND PATHOGENIC CHARACTERISTICS OF MACROPHOMINA PHASEOLINA ISOLATES FROM SUGAR BEET Stojšin, V., Budakov, D., Bagi, F., Đuragin, N., Marinkov, R. Department for Environmental and
More informationBacteria. The Three Types of Important Heterotrophic Bacteria
Bacteria Kingdom Monera Prokaryote (their genetic material is not bound with a membrane) Classified according to shape - Spherical (cocci) - Spiral - Rod Shaped -TWO TYPES: Heterotrophic (organism that
More informationHOMEOWNER PLANT DISEASE CLINIC REPORT Holly Thornton, Homeowner IPM Specialist
MARCH 2007 HOMEOWNER PLANT DISEASE CLINIC REPORT Holly Thornton, Homeowner IPM Specialist As March nears an end, sample submission (both Commercial and Homeowner) is beginning to increase as I expected
More informationPathology ABSTRACT INTRODUCTION
Pathology RESEARCH ON GRASSY SHOOT DISEASE OF SUGARCANE IN MAHARASHTRA STATE G. K. Zende and N. B. Shaikh Sugarcane Research Station Padegaon, Maharashtra, India ABSTRACT Investigations were undertaken
More informationAcoustic Emission Technique for the Detection of Abnormal Cavitation in Pine Trees Infected with Pine Wilt Disease
Acoustic Emission Technique for the Detection of Abnormal Cavitation in Pine Trees Infected with Pine Wilt Disease Keiko Kuroda (Kansai Research Center, Forestry and Forest Products Research Institute,
More informationSymptoms associated with Candidatus Liberibacter solanacearum in potato
Detection and identification of Candidatus Liberibacter solanacearum in potato and tomato Binoy Babu, Nicholas Dufault, Mathews Paret and Carrie L. Harmon A new bacterial species Candidatus Liberibacter
More informationMonthly overview. Rainfall
Monthly overview 1-10 May 2018 During the first ten days of May, dry conditions were experienced across the country. Temperatures dropped to below 10 C over the southern half of the country for the first
More informationSun Helps Geraniums Poison Japanese Beetles
April, 1929 71 Sun Helps Geraniums Poison Japanese Beetles An insect poison that seems to need the aid of the sun to develop its best effects has been observed in connection with the campaign against the
More informationTopics. Physiological Disorders and Environmental Stresses. Physiological Disorders. Physiological Disorders
Topics Physiological Disorders and Environmental Stresses Kimberly Williams Overview and terminology Caused by chemicals or air pollution Caused by moisture management Caused by temperature and/or light
More informationDiagnosing Suspected Off-target Herbicide Damage to Grape
Diagnosing Suspected Off-target Herbicide Damage to Grape W 297-B Introduction Pasture and right-of-way herbicides have the potential to move off-target and can severely impact grape production. While
More informationSaving rambuttan trees
Saving rambuttan trees Wasantha RAMANAYAKE May 10, 2009 Apple and snow are inseparable, in a way like a couple. When snow disappears for good, the other could only weep because it could no longer bear
More informationManagement Of Insect And Mite Vectors Of Vegetable Diseases
Great Plains Growers Conference And Trade Show St. Joseph, MO January 12, 2018 Management Of Insect And Mite Vectors Of Vegetable Diseases Raymond A. Cloyd Professor and Extension Specialist in Horticultural
More informationBreeding for Drought Resistance in Cacao Paul Hadley
Breeding for Drought Resistance in Cacao Paul Hadley University of Reading Second American Cocoa Breeders Meeting, El Salvador, 9-11 September 215 9 September 215 University of Reading 26 www.reading.ac.uk
More informationAn Alternaria Leaf Spot of the Sugar Beet
An Alternaria Leaf Spot of the Sugar Beet J. S. MCFARLANE, ROY BARDIN AND WILLIAM C. SNYDER 1 A hitherto unreported disease of the sugar beet, Beta vulgaris L., incited by a parasitic species of Alternaria
More informationParasitic Diseases. Plants killing plants
Parasitic Diseases Plants killing plants Parasitic Plants According to the American Heritage Dictionary a parasite is- An organism that grows, feeds, and is sheltered on or in a different organism while
More informationTONGA COUNTRY REPORT. Officer : John Holi
TONGA COUNTRY REPORT Officer : John Holi OUTLINES INTRODUCTION BACKGROUND INFORMATION CLIMATE TONGA METEOROLOGICAL SERVICE PROPOSAL INTRODUCTION Location of Tonga Lies between 15 173 W 155 177 W 25.55
More informationPlant Diagnostics 101 for Landscapers. Mike Munster & Matt Bertone Plant Disease and Insect Clinic Last revision: 26 July 2017
Plant Diagnostics 101 for Landscapers Mike Munster & Matt Bertone Plant Disease and Insect Clinic Last revision: 26 July 2017 Part 0 AN OBSERVATIONAL EXERCISE Sampson Co, NC. July 2017 Photo: Brad Hardison,
More informationWeird and Wild World of Physiological Disorders. Andy Robinson, Ph.D. Extension Potato Agronomist NDSU / U of
Weird and Wild World of Physiological Disorders Andy Robinson, Ph.D. Extension Potato Agronomist NDSU / U of M @spudology Kahoot.it What is a physiological disorder? Non-infectious (do NOT spread). Something
More informationSoybean stem fly outbreak in soybean crops
Soybean stem fly outbreak in soybean crops By Kate Charleston Published: April 10, 2013 An estimated 4,000 ha of soybeans near Casino in Northern NSW have been affected to varying degrees by soybean stem
More informationNusipepa Lepale Samoa
Data Collection and modelling for adaptation Nusipepa Lepale Samoa Presentation Outline Background info Geography Climate of Samoa Impacts of Climate Change (CC) in Samoa CC Adaptation in Samoa Data Observation
More informationThe market place for flowers and green
Inspection codes The market place for flowers and green Code Description Code Description 0 NO COMMENTS 471 NOT DEFOLIATED 1 IMPURE FLOWERS 472 SOME LIMP NECKS 2 LOOSE PLANTS 473 LIMP NECKS 3 YOUNG PLANTS
More informationBreeding value for cassava mosaic disease resistance analyzed in a seedling nursery
Breeding value for cassava mosaic disease resistance analyzed in a seedling nursery Kulakow Peter A. 1, Bakare Moshood A. 1, Agbona Afolabi 1, Parkes Elizabeth Y. 1, Ceballos Hernan 2, Rabbi Ismail Y.
More informationBio 100 Guide 27.
Bio 100 Guide 27 http://www.offthemarkcartoons.com/cartoons/1994-11-09.gif http://www.cneccc.edu.hk/subjects/bio/album/chapter20/images/plant_growth.jpg http://pgjennielove.files.wordpress.com/2008/06/apical_meristem.png
More informationEuropean Union Community Plant Variety Office
European Union Community Plant Variety Office PROTOCOL FOR DISTINCTNESS, UNIFORMITY AND STABILITY TESTS Eustoma grandiflorum (Raf.) Shinners EUSTOMA (LISIANTHUS) UPOV Species Code: EUSTO_GRA Adopted on
More informationMISSISSIPPI SOYBEAN PROMOTION BOARD PROJECT NO FINAL REPORT
MISSISSIPPI SOYBEAN PROMOTION BOARD PROJECT NO. 45-2014 FINAL REPORT TITLE: EVALUATION OF SPRAY NOZZLE SELECTION ON DICAMBA DRIFT EFFECTS WHEN APPLIED UNDER FIELD CONDITIONS PI: Dan Reynolds EXECUTIVE
More informationPlant Pathology Fact Sheet
Plant Pathology Fact Sheet PP-42 Dasheen Mosaic Disease of Araceous Foliage Plants G. W. Simone and F. W. Zettler, Professor Retired, Extension Plant Pathologist and Professor Plant Pathology Department,
More informationViroids are unique plant pathogens that are smaller than viruses and consist of a short single-stranded circular RNA without a protein coat (Diener,
Citrus Viroids Viroids are unique plant pathogens that are smaller than viruses and consist of a short single-stranded circular RNA without a protein coat (Diener, 1971). These pathogens cause damage to
More informationA garden centre dedicated to gardening. The Basics of. Pruning Shrubs, Perennials and Climbing Plants
A garden centre dedicated to gardening. The Basics of Pruning Shrubs, Perennials and Climbing Plants Pruning Shrubs, Perennials & Climbing Plants 3) Cultivation requirements & growing positions 3) Pests
More informationover the next three weeks could lower this estimate significantly. Near perfect conditions are needed to realize this projected yield.
Peanuts across the V-C region experienced excessive rainfall in many areas as a result of Hurricane Florence. Rainfall was particularly heavy in southeastern North Carolina and northeastern South Carolina.
More informationIntegrated Pest Management in rice
Integrated Pest Management in rice Yellow stem borer (Scirpophaga incertulas)` Most dominant and destructive species The larvae of the borers enter the tiller to feed, grow and cause the characteristic
More informationThe three principal organs of seed plants are roots, stems, and leaves.
23 1 Specialized Tissues in Plants Seed Plant Structure The three principal organs of seed plants are roots, stems, and leaves. 1 of 34 23 1 Specialized Tissues in Plants Seed Plant Structure Roots: absorb
More informationEC Cedar Apple Rust
University of Nebraska - Lincoln DigitalCommons@University of Nebraska - Lincoln Historical Materials from University of Nebraska- Lincoln Extension Extension 1963 EC63-1806 Cedar Apple Rust John Weihing
More informationMonthly Overview. Rainfall
Monthly Overview Rainfall during August occurred mainly over the Western and Eastern Cape provinces, and KwaZulu- Natal. Rain in these provinces were regularly accompanied by cold fronts as they made landfall
More informationChapter 33 Plant Responses
Chapter 33 Plant Responses R. Cummins 1 Chapter 33 Plant Responses External Factors Light, Day Length, Gravity, Temperature Internal Factors Hormones R. Cummins 2 Tropisms R. Cummins 3 Phototropism and
More informationEuropean Union Community Plant Variety Office
European Union Community Plant Variety Office PROTOCOL FOR DISTINCTNESS, UNIFORMITY AND STABILITY TESTS Portulaca oleracea L. PORTULACA UPOV Species Code: PORTU_OLE Adopted on 16/10/2008 Entered into force
More informationwild tomato tomato teosinte corn, maize
2 wild tomato tomato teosinte corn, maize 4 Crop Wild Relatives Traditional landraces Modern cultivars Genetic bottlenecks during crop domestication and during modern plant breeding. The circles represent
More informationEthephon in Sugarcane Cultivation
Ethephon in Sugarcane Cultivation by M. Edmond Lewis Sugar Industry Research Institute ABSTRACT Sugarcane remains an important commercial crop in Jamaica, and in spite of improved technology in production,
More informationBrachypodium distachyon,, a new model plant. Richard Sibout
Brachypodium distachyon,, a new model plant Richard Sibout ALICE: Brachypodium seed stocks Leaf DNA M2 Phenotyping (visual and chemical) (Versailles) 6 seeds (plants) Mutagenesis M1 M2 seeds production
More informationSTOLLER ENTERPRISES, INC. World leader in crop nutrition
A new paradigm for crop production - Page 1 of 6 A NEW PARADIGM FOR CROP PRODUCTION Most agronomists are taught about the chemical process of manufacturing photosynthates (PS). The plants breathe in carbon
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 informationPlant and animal cells (eukaryotic cells) have a cell membrane, cytoplasm and genetic material enclosed in a nucleus.
4.1 Cell biology Cells are the basic unit of all forms of life. In this section we explore how structural differences between types of cells enables them to perform specific functions within the organism.
More information-Each asexual organs. -Anchors the plant -Absorbs water and minerals -Stores sugars and starches
Plants are made up of: -organs, tissues, and cells The three major plant organs are: -Roots, stems, and leaves -Each asexual organs Plants have a Root System beneath the ground that us a multicellular
More informationClimate Risk Profile for Samoa
Climate Risk Profile for Samoa Report Prepared by Wairarapa J. Young Samoa Meteorology Division March, 27 Summary The likelihood (i.e. probability) components of climate-related risks in Samoa are evaluated
More informationSEASONAL CLIMATE PREDICTION
SEASONAL CLIMATE PREDICTION David Walland Australian Bureau of Meteorology WMO RA-V Seminar on Climate Services Honiara, Solomon Islands, 1-4 November 2011 Overview Major climate Drivers in the region
More informationEarth & Beyond Teacher Newsletter
Paul Floyd s Astronomy & Space Website Earth & Beyond Teacher Newsletter www.nightskyonline.info Earth & Beyond Teaching opportunities for 2012 This special edition has been prepared to assist you with
More informationNuku alofa. Chapter 14 Tonga. The contributions of Ofa Fa anunu and Mele Lakai from the Tonga Meteorological Service are gratefully acknowledged
Nuku alofa Chapter 14 Tonga The contributions of Ofa Fa anunu and Mele Lakai from the Tonga Meteorological Service are gratefully acknowledged 215 Introduction This chapter provides a brief description
More informationAngela R. Post Aug 20, 2015
1 Angela R. Post Aug 0, 015 Banded application - treating narrow strips with herbicides. The strip centered on the crop row A Band is usually 10 to 1 inches wide. This is an efficient way to manage weeds
More informationIt is never so good as expected and never so bad as feared.
2018 General: The weather conditions in the Baltics and Scandinavia have not been perfect - not enough rain and high temperatures after drilling. As Scandinavia and Baltics was the area where there was
More informationSituation of corn in Myanmar
Situation of corn in Myanmar Phyu Phwe New Plant Variety Protection Unit Department of Agricultural Research(DAR) (2. 8.2016) Introduction Maize - second mandate cereal in Myanmar after rice Mainly utilized
More informationGrowing Chickpea in Eastern Africa
Citation: I C R I S A T ( I n t e r n a t i o n a l C r o p s R e s e a r c h I n s t i t u t e f o r t h e S e m i - A r i d T r o p i c s ). 1 9 9 1. G r o w i n g c h i c k p e a i n e a s t e r n A
More informationFunded by Japan Government through UN ESCAP and BMKG
METEOROLOGY & COAST RADIO SERVICES MINISTRY OF METEOROLOGY, ENERGY, INFORMATION,DISASTER MANAGEMENT, ENVIRONMENT, CLIMATE CHANGE AND COMMUNICATION KINGDOM OF TONGA P. O. Box 845, Domestic Terminal, Fua
More informationWHEN CAN YOU SEED FALLOW GROUND IN THE FALL? AN HISTORICAL PERSPECTIVE ON FALL RAIN
WHEN CAN YOU SEED FALLOW GROUND IN THE FALL? AN HISTORICAL PERSPECTIVE ON FALL RAIN Steve Petrie and Karl Rhinhart Abstract Seeding at the optimum time is one key to producing the greatest yield of any
More informationDistance Learning course Plant pathology and entomology Covered topics
Distance Learning course Plant pathology and entomology Covered topics The distance learning course Plant pathology and entomology consist of four online modules that treat with the main groups of plant
More informationRESISTANCE TO WHITE RUST (Albugo tragopogonis) and EVIDENCE OF MULTIPLE GENES
RESISTANCE TO WHITE RUST (Albugo tragopogonis) and EVIDENCE OF MULTIPLE GENES T. J. Gulya, USDA-ARS, Northern Crop Science Laboratory, Fargo ND 58105, USA P. S. van Wyk, ARC Oil & Protein Centre, Potchefstroom
More informationScreening and Evaluation of Potato (Solanum tuberosum) Genotypes to Identify the Sources of Resistance to Potato Apical Leaf-Curl Disease
Available online at www.ijpab.com Maan et al Int. J. Pure App. Biosci. 5 (3): 53-61 (2017) ISSN: 2320 7051 DOI: http://dx.doi.org/10.18782/2320-7051.2658 ISSN: 2320 7051 Int. J. Pure App. Biosci. 5 (3):
More information