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LEDPIDOPTERA Butterflies, moths, and skippers
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LEDPIDOPTERA Lepis: scales Ptera: wings Complete Larva: chewing 2 pair Covered with scales (powdery) Butterfly: hold wings vertically Moth: flat, roof-like, or curled around body
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LEDPIDOPTERA Bacillus thurengiensis (Bt) Butterfly is diurnal (day) Pupa referred to as chrysalis Moth is nocturnal (nocturnal) Pupa in silken cocoon or leaf litter
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BAGWORM Larva-in-a-bag Bag is silk and foliage/debris
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BAGWORM Adults do not feed Female: wingless, grublike; never leaves bag Lays eggs in bag then dies (1000 eggs/bag)
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BAGWORM Male: small, brown clear wing moth Mates, dies
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BAGWORM HOST Mostly conifers (junipers and arborvitae) Some deciduous
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BAGWORM DAMAGE Skeletonizer of foliage
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BAGWORM MONITOR Visual inspection for bags in June
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BAGWORM CONTROL Handpick and destroy Parasitic wasp provide control, often after damage done Pheromone used to disrupt mating
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AZALEA CATERPILLAR
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HOST Azaleas
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AZALEA CATERPILLAR DAMAGE Defoliate branch Feed in large groups at end of branches in late summer
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AZALEA CATERPILLAR MONITOR Visually inspect in late July Tend to repeat on same hosts
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AZALEA CATERPILLAR CONTROL Prune or handpick
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WEBWORMS Fall webworm: web at end of branches in July to fall
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WEBWORMS Tent caterpillar: web in crotches in spring
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WEBWORMS Mimosa webworm: upstate on mimosa and honeylocust
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Spiders
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WEBWORMS HOSTS Just about anything woody Prunus species, pecans especially
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WEBWORMS DAMAGE Defoliates branches Mainly visual
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WEBWORMS MONITORING Visually inspect plants
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WEBWORMS CONTROL Pruning or remove nest Difficult to penetrate nest for other control
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GYPSY MOTH Dark larva with red dots Adult: white female with inverted V Introduced from Europe in 1887 –Escaped from silkworm research
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GYPSY MOTH HOST Most serious pest of NE deciduous plants
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GYPSY MOTH
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DAMAGE Complete defoliation by larva Feed at night, crawl down to hide in bark and litter Weakens host… susceptible to other pests
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GYPSY MOTH MONITORING Burlap wrap of trunk to count larvae
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GYPSY MOTH MONITORING Pheromone traps Egg mass counts in winter http://www.youtube.com/ watch?v=N-3-hIj-6cshttp://www.youtube.com/ watch?v=N-3-hIj-6cs
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GYPSY MOTH CONTROL Predator and fungus release –SuccessSuccess –The dramatic decline of the gypsy moth population in New Jersey is due to the combination of effective treatments in spring of 2009 and the impacts of predatory parasites and natural fungus that kill gypsy moth caterpillars, according to Douglas Fisher, the state’s agriculture secretary.
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LEAFROLLERS Indistinct green larva Roll leaves or tie leaves together for protection
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LEAFROLLERS HOST Sweetgums (tiers), canna (rollers)…
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Vinca Leaf Roller
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COLEOPTERA beetles and weevils
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COLEOPTERA Coleos: sheath Ptera: wing Complete Chewing Wings: –Front: hardened (elytra), not for flight –Back: membranous Larva are grubs
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WHITE GRUBS C-shaped larva Several different species are a pest
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WHITE GRUBS Identify species by rastral pattern
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WHITE GRUBS Identify species by rastral pattern
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WHITE GRUBS
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Weevils are legless white grubs
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WHITE GRUBS HOST Turf Lush, high irrigation and fertilization Many are harmless, feed on OM
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WHITE GRUBS DAMAGE Consume roots in late summer Water stress spots in mid-August
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WHITE GRUBS MONITOR Direct sample (8 to 12 grubs / sq ft) Pull water stressed spots in August –Mole crickets?
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WHITE GRUBS CONTROL Milky spore, Japanese beetle only
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JAPANESE BEETLE Larva: white grub The grub was introduced in 1916 from Japan on Iris roots
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JAPANESE BEETLE
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HOST Larva: turf roots Adult: rose, Prunus, maple, other woody plants…
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JAPANESE BEETLE DAMAGE Larva: feed on turf roots Adult: June to September
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JAPANESE BEETLE DAMAGE Tissue between veins (young leaves) Lacey symptoms
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JAPANESE BEETLE DAMAGE Also eat fruit and blossoms
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JAPANESE BEETLE MONITOR Pheromone traps Branch beating adults
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JAPANESE BEETLE CONTROL Larva: Milky spore disease, nematodes, insecticide Established woody can tolerate
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WEEVILS Snouts beetles Many flightless (elytra fused) Larva: legless grubs
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WEEVILS HOST Whitefringed beetle: Azalea Palmetto weevil: Palms Other weevils, most other woody plants…
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WEEVILS Whitefringed beetle
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WEEVILS DAMAGE: Whitefringed beetle Adults: notched symptoms on foliage in July
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WEEVILS CONTROL: Whitefringed beetle Plants tolerant in Lowcountry
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WEEVILS Palmetto weevil
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WEEVILS DAMAGE: Palmetto weevil Dying or weak palm gives off scent Male locates susceptible palm, releases pheromone
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WEEVILS DAMAGE: Palmetto weevil Larva feeds on crown “Breaks” the neck http://www.youtube.com/watch?v=ZWlt kUZgZPchttp://www.youtube.com/watch?v=ZWlt kUZgZPc
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WEEVILS CONTROL: Palmetto weevils Insecticides no good once infested Cut down before adult emerges Mass trapping and sanitation
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BARK BEETLES Size of rice Dark, red, brown, or black Southern Pine Beetle
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BARK BEETLES Vectors blue stain fungus
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BARK BEETLES Larvae tunnel called galleries (packed with frass)
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BARK BEETLES HOST Pine, spruce… Plants in weakened state (predisposed) http://www.youtube.com/watch?v=t_5t BnvCj3shttp://www.youtube.com/watch?v=t_5t BnvCj3s
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BARK BEETLES DAMAGE Larvae tunnel through the phloem Pitch around boring holes Sawdust below Further weaken host
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BARK BEETLES DAMAGE European Elm Bark Beetle –1904 in Boston Attacks American Elms and introduces spores of the Dutch Elm Disease (DED)
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BARK BEETLES
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MONITORING Declining branches –Break open Pheromone traps
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Pheromone Repellent http://www.forestrydistributing.com/en/ verbenone-pine-beetle-repellent- pouch-retailhttp://www.forestrydistributing.com/en/ verbenone-pine-beetle-repellent- pouch-retail
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BARK BEETLES CONTROL Avoid unseasoned firewood storage near hosts –Cover with plastic for several months Destroy infected branches Systemic insecticides do NOT work once there are symptoms Some resistant varieties, such as Valley Forge American elm
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BORERS Flathead borers Legless grub
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BORERS Flathead borers Metallic adults (copper, blue, green) Steamlined, bullet shaped Grooved wings
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BORERS Flathead borers
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BORERS Roundhead borers
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BORERS Roundhead borers Long antennae (long horn beetles)Long antennae (long horn beetles)
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BORERS HOST Predisposed trees Mostly deciduous Rarely attack healthy host
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BORERS DAMAGE Larvae bore throughout tree Finish off dying host
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Squash Borer
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BORERS MONITOR Limb dieback Boring holes wet or oozing
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BORERS (179) MONITOR Limb dieback Boring holes wet or oozing
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BORERS CONTROL Avoid unseasoned firewood storage near hosts Destroy infected branches Systemic insecticides do NOT work http://www.youtube.com/watch?v=3SS t1kNMahEhttp://www.youtube.com/watch?v=3SS t1kNMahE
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TWIG BEETLES Twig borer Lay eggs in twig and introduce Ambrosia fungus Larva feed on fungus Pupate in twig before winter
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TWIG BEETLES Twig borer HOST Southern Magnolia, redbud, dogwood…
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TWIG BEETLES Twig borer DAMAGE Small branches wilting and dying Hole located at base Does not harm the health on host
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Red Bay Ambrosia Beetle Decimating red bay trees Red bay wilt (closely related to DED) http://okeechobee.if as.ufl.edu/News%2 0columns/Red.Bay. htmhttp://okeechobee.if as.ufl.edu/News%2 0columns/Red.Bay. htm
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Red Bay Ambrosia Beetle Discoloration of outer sapwood
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Red Bay Ambrosia Beetle May push out “stick” as it feeds
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