Knowing Your Insect Control Options for Trees and Shrubs. The Latest on Managing EAB
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1 Knowing Your Insect Control Options for Trees and Shrubs & The Latest on Managing EAB PJ Liesch UW-Madison:
2 Pollinators! Bees, wasps, beetles, moths, butterflies! Honey bees, bumble bees, solitary bees
3 Pollinator Decline! Pollinators, especially bees have been declining! Reasons:! Habitat loss! Diseases: protozoans, viruses, etc.! Parasitic mites! Interactions with pesticides
4 How$Neonico*noids$and$Bees$Became$a$Crisis$$ for$greenhouse$and$nursery$growers:$the$last$16$months$ June$20,$2013$ $ Buzzkill:$Huge$bee$dieBoff$in$Oregon$parking$lot$blamed$on$insec*cide$spraying$ Grist.org,$Oregon$Public$Broadcas*ng! 25,000!dead!bumble!bees!in! Target!parking!lot! Linden!trees!in!full!bloom!had! been!sprayed!with!safari! (dinotefuran)! Slide!Credit:!Dave!Smitley,!MSU!
5 What Does the Label Say? This product is highly toxic to honeybees and other bees exposed to direct treatment or residues on crops or weeds in bloom. Do not apply this product to target crops or weeds in bloom.
6
7 What Can YOU Do?! Use pesticides only when needed! Read the pesticide label; follow all directions! Choose products that are less toxic to bees! Apply insecticides early in the morning or in the evening! Minimize drift! Avoid applying pesticides to flowering plants! Be aware of your surroundings! Weeds can be food source for pollinators!
8 Published!Sept.!2014! More$than$50$species$of$pollinators$found$$ $$$$$$on$dandelions$and$white$clover$in$lawns$ Slide!Credit:!Dave!Smitley,!MSU!
9 Assessing$Insec*cide$Hazard$to$Bumble$Bees$Foraging$ on$flowering$weeds$in$treated$lawns$ Bumble!bees!colonies!caged!24!h!aKer!turfgrass!with!clover!was! sprayed,!and!kept!their!for!2!weeks:!! ClothianidinL!foraging!bees!reduced!by!75%;!no!new!queens! produced!(compared!with!35!queens!in!control!plots)! Chlorantraniliprole!L!No!difference!from!control!treatment! For!lawns!mowed!before!sprayingL!!No!effect!on!the!bees! Slide!Credit:!Dave!Smitley,!MSU!
10 Sprays!versus!granular!applicaUons!! No adverse effects Gels, Held & Potter 2002
11 Good Guys in the Landscape! Predatory insects can be very common in the landscape Predators! Beetles! True bugs! Flies! Lacewings and kin! Yellowjackets and wasps! Spiders Parasites! Wasps! Flies! Roundworms (nematodes) Pathogens! Bacteria! Fungi! Viruses
12 Predators: Beetles Ground beetles Firefly Larva (w/slug) Rove beetles
13 Predators: Lady Beetles Multicolored Asian Lady beetle (Harmonia axyridis) (Coleoptera: Coccinellidae)
14 Predators: True Bugs Minute Pirate Bug Damsel Bug Spined Soldier Bug Assassin Bug
15 Predators: Flies Hover Fly (Diptera: Syrphidae) Robber Fly Tachinid Fly
16 Predators: Lacewings
17 Predators: Wasps Yellow Jacket (Hymenoptera: Vespidae) Bald Faced Hornet (Hymenoptera: Vespidae)
18 Parasites! Usually specialists (only kill one or a few hosts)! Can be ecto- or endo- parasites (external vs. internal)! Same size or smaller than prey! Examples:! Wasps! Flies
19 Parasitic Wasps! Many species known! Tend to attack only a single specific host! Some have been purposely released for biocontrol
20 Parasites: Flies Pyrgotid Fly and May/June Beetle Tachinid Flies
21 Nematodes & Pathogens! Some can be highly specific, others can infect many hosts! Can be significantly influenced by weather! Some are commercially available
22 Pathogens: Fungi! Spread through spores! Most require high humidity! Some commercially available
23 Pathogens: Bacteria! Some are commercially available! Milky spore (Bacillus popilliae)! Bacillus thuringiensis Milky Spore Infected Non-Infected
24 ! Are highly specific Pathogens: Viruses! Viruses exist for many insects, including pests such as armyworms, black cutworm, and gypsy moth
25 Why Should you Keep an Eye Out for Beneficial Organisms?! If predators/parasites/pathogens are present in numbers:! Why treat if Mother nature can help correct the problem! Eliminating predators can sometimes lead to other problems
26 Bad Bugs in the Landscape
27 Bad Bugs in the Landscape! Several main groups exist: 1. Sucking Insects 2. Caterpillars 3. Leaf-Feeding Beetles 4. Borers 5. Other Leaf Feeders 6. White Grubs Resources to ID your Bad Bugs Garden Insects (Cranshaw) Insects that Feed on Trees and Shrubs (Johnson and Lyon) County Extension Office
28 Sucking Insects! Aphids, adelgids, plant bugs, tree hoppers, lace bugs, spittle bugs! Order Hemiptera: tubular mouthparts! Damage: irregular discoloration, chlorosis, shriveling
29 Common Sucking Insects Ash Plant Bug Four Lined Plant Bugs Lace Bugs Honeylocust Plant Bug
30 Common Sucking Insects Aphids Cooley Spruce Adelgid Adelgids Insect Diagnostic E. Spruce Lab Adelgid
31 Common Sucking Insects Leafhopper and Hopperburn Treehoppers Spittle Bugs
32 Common Sucking Insects Jumping Plant Lice (Psyllids) Chinch Bug
33 Sucking Insects: Scale Insects! Two Types: Armored (i.e., Hard) and Soft Scales! > 60 species in Midwest! Damage plant by sucking plant juices! Relatively immobile, only move as crawlers (young)
34 Caterpillars! Many species are pests of turfgrass and ornamentals! Order Lepidoptera (Moths and Butterflies)! Chewing damage to plants
35 Eastern Tent Caterpillar Common Caterpillar Pests Fall Webworm Gypsy Moth Cankerworm Yellow Necked Caterpillar
36 Common Caterpillar Pests Zimmerman Pine Moth European Pine Shoot Moth Black Cutworm Sod Webworms
37 Leaf-Feeding Beetles! Order Coleoptera: Beetles! Adults and larvae can be pests depending on species! Chewing Damage to Plants! Damage sometimes called skeletonization
38 Common Leaf-Feeding Beetles Japanese Beetle Imported Willow Leaf Beetle May/June Beetle Elm Leaf Beetle
39 Leaf Beetles Lily Leaf Beetle Viburnum Leaf Beetle
40 ! Two Main Types of Borers:! Coleoptera (beetles)! Lepidoptera (caterpillars) Borers! Use chewing mouthparts to tunnel into stems/trunks! Can be difficult to identify and manage! Typically associated with stressed/dead/dying trees
41 Common Borers (Lepidoptera) Peachtree Borer ( / ) Banded Ash Clearwing Borer Viburnum Borer
42 Common Borers (Coleoptera) Emerald Ash Borer
43 Douglas Bayfield Ashland Iron EAB: Quarantine early 2014 Vilas Burnett Washburn Sawyer Florence Price Oneida Forest Polk Barron Rusk Taylor Lincoln Langlade Marinette St. Croix Pierce Dunn Pepin Chippewa Eau Claire Clark Marathon Menominee Shawano Oconto Door Buffalo Trempealeau Jackson Wood Portage Waupaca Outagamie Kewaunee Brown Waushara Winnebago Manitowoc Calumet La Crosse Monroe Juneau Adams MarquetteGreen Lake Fond du Lac Sheboygan Vernon Richland Sauk Columbia Dodge Washington Ozaukee Quarantined County Crawford Grant Iowa Lafayette Green Dane Jefferson WaukeshaMilwaukee Racine Rock Walworth Kenosha Map Credit: WI-DATCP
44 EAB: Quarantine December, 2014 Map Credit: WI-DATCP
45 Common Borers (Coleoptera) Bark Beetles Two Lined Chestnut Borer Bronze Birch Borer
46 Other Leaf Feeders! Sawflies (Order Hymenoptera)! Caterpillar-like! Use chewing mouthparts to feed on leaf material! Leafminers (from a variety of groups)! Tunnel between upper and lower leaf surfaces
47 Common Sawflies Elm Sawfly European Pine Sawfly Redheaded Pine Sawfly Dusky Birch Sawfly
48 Caterpillars vs. Sawflies Caterpillars 3 pairs of true legs 4-5 pairs of prolegs often present, have hooks called crochets Sawflies: Not a caterpillar! 7 pairs of prolegs No crochets
49 Leafminers Elm Leafminer Birch Leafminer Arborvitae Leafminer
50 ! Larvae of Scarab beetles! May/June Beetles! Japanese beetles White Grubs! Can be very destructive to turfgrass
51
52 Managing Landscape Insects! Know which pest you re dealing with!! Are there cultural/mechanical practices that are effective?! Ex. remove E. tent caterpillar tents by hand! Know when to target your pest! Choose an appropriate insecticide! Apply it properly!
53 Insecticides Chemical Class Example Insects Groups Controlled Carbamates Carbaryl Contact Spray Organophosphates (OP s) Pyrethroids Neonicotinoids Acephate, Trichlorfon Bifenthrin, Deltemethrin, etc. Imidacloprid, Thiamethoxam, Dinotefuran Contact Spray; systemic activity (acephate) Contact Spray Systemic activity; contact spray*
54 Insecticides Chemical Class Example Insects Groups Controlled Insect Growth Regulators Azadirachtin Contact spray; systemic activity (some products) Indoxacarb Indoxacarb Contact Spray Anthranilic Diamides Avermectins Chlorantraniliprole Emamectin benzoate Contact spray; some systemic activity Systemic activity Biological Bt & Spinosad Contact sprays Others Oils, soaps Contact Sprays
55 The$Latest$on$Managing$EAB$$
56 Host$Plant$Resistance$ $ Manchurian!ash!not!fully!resistant! Survival!of!blue!ash!trees!noted!by! McCullough!in!Michigan! Only!significant!resistance!in!any!naUve! ash!species!
57 Common$Misconceptions$ Regarding$the$Management$of$EAB$ ALL!ash!trees!are!doomed! Ash!Trees!can!NOT!be!saved!or!protected! InsecUcide!Treatments!are!NOT!EffecUve! InsecUcide!Treatments!are!cost!prohibiUve! Only!ONE!insecUcide!product!is!effecUve!
58 Chemical$Treatment$Availability$ $ Professional!Use!Products!(arborists)! Several!chemicals!available! Several!applicaUon!methods!available! Require!specialized!training!and!equipment! Homeowner!products! Imidacloprid!and!Acephate!available!! Soil!drenches!and!trunk!implants!available! Can!be!purchased!at!local!gardening!centers!
59 Professional$EAB$Insecticide$Treatment$Options$ Imidacloprid! Merit!(Soil!drench!or!injecUon)! Xytect!(Soil!drench!or!injecUon),!2X!label!rate!! Pointer!(Trunk!InjecUon,!Wedgle)! IMALJet!(Trunk!InjecUon,!ArborJet)! Imicide!(Trunk!InjecUon,!Mauget)! Dinoterfuan! Transtect!(Basal!Bark!Spray!or!Soil!Drench)! Safari!(Basal!Bark!Spray!or!Soil!Drench)! EmamecUn!Benzoate! Treeäge!(Trunk!InjecUon,!ArborJet),!RUP*! See UW-Extension Factsheet: XHT1185 Professional Guide to Emerald Ash Borer Insecticide Treatments! AzadirachUn! Treeazin!(Trunk!InjecUon),!Only!organic!opUon!available!! Others! Acepahte!(AceLJet,!ACECAP),!contact!(trunk!&!canopy)!sprays!
60 Insecticide$Application$Techniques$ Soil!Drench!Method! Basal!Bark!Spray!
61 Professional$Tree$Injections$ Mauget Arborsystems Wedgle Arborjet Tree IV
62 Soil$Application$vs.$Trunk$Injection:$ Soil!ApplicaUon!!!!Pros:!!!Noninvasive,!can!be!easy!to!apply!!!!!Cons:!!Slower!uptake!(3L6!weeks)!!! Trunk!injecUon!!!!Pros:!!!Rapid!uptake!(under!good!condiUons);!!!!!!!!!!!!!!!!apply!where!soil!treatments!not!possible!!!!!Cons:!!Specialized!equipment,!trunk!wounding!
63 Homeowner$EAB$Insecticide$Treatment$Options$ Acecap Systemic Tree Implants AmdroTree and Shrub Care Concentrate Bayer Advanced Tree and Shrub Products (several) Compare N Save Systemic Tree and Shrub Insect Drench Ferti-loam Systemic Tree and Shrub Drench Monterey Once A Year Insect Control Ortho Bug B Gone Year Long Tree and Shrub Insect Control Optrol (same 2X rate as Xytect) Other products may exist, market changes regularly! See UW-Extension Factsheet XHT1181: Homeowner Guide to Emerald Ash Borer Insecticide Treatments
64 Homeowner! InsecUcide!OpUons! Soil!Drench!Method! For!a!video!demonstraUon!of!how!to! apply!a!soil!drench!insecucide,!visit!the! UWLMadison!Emerald!Ash!Borer!website:!! labs.russell.wisc.edu/eab/! Acecap!Systemic!Tree!Implants!
65 Optimal$Timing$of$EAB$Treatments$ EAB!Adults!emerge!around!450L500!GDD! Around!the!Ume!that!black!locust!is!in!bloom! Systemic!products!need!to!be!applied!before!this!to!allow!for!uptake! Soil!Treatments! In!Spring!allowing!Ume!for!uptake!before!adults!begin!to!feeding! and!eggs!begin!to!hatch! Typically!early!May!for!small!trees,!April!for!larger!trees! Trunk!InjecUons! In!Spring!just!aKer!the!canopy!has!fully!developed!
66 What s$on$the$radar?$ boregone!!(phyllom!bioproducts)! ArbormecUn!(Rainbow!Treecare.!.!.Rotam!Agrichemical)! Similar!to!Treeage,!but!nonLRUP! CauUon!instead!of! Warning!signal!word!
67 Should$you$treat$your$tree$for$EAB?$ Several!factors!to!consider!before!to!treaUng!you!ash!trees:! Tree!health! Tree!locaUon! Tree!value! Costs!to!treat! Costs!to!remove! See UW-Extension Factsheet XHT1215:! Is My Ash Tree Worth Treating for Emerald Ash Borer
68 Questions? PJ Liesch UW-Madison: labs.russell.wisc.edu/insectlab/ labs.russell.wisc.edu/eab/!(eab!website)!
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