leaf miners - extension entomology€¦ · leaf mining. elm flea weevil orchestes alni first found...
TRANSCRIPT
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Leaf Miners
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Leaf Miner Types
serpentine blotch
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Leaf Miner or Scorch?
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Managing Leaf Miners
Identify- Is it a fly, moth, wasp or beetle?Foliar acephate kills all 4 kinds
Spinosad kills flies, moths, and wasps.
Soil applied imidacloprid kills wasps, beetles and flies
Learn life cycle
Target newly hatched larvae with insecticideTiming differs for contact, systemic foliar and soilapplied systemic insecticides
Conserve natural enemies
Nematodes
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Insecticide Application Targets
Contact Insecticide (Adults)Adults pick up insecticide as they walk on leaves in searchof egg laying sites
(eg. Pyrethroids – permethrin, bifenthrin, deltamethrin etc)
Foliar systemic insecticide (Larvae)Material penetrates leaf tissue
Direct toward egg hatch and young larvae
(eg. acephate, spinosad)
Soil applied insecticide (Larvae)Apply in fall or early spring to soil
Young leaf tissue in contains insecticide that killes larvae
(eg. Imidacloprid)
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Birch Leaf Miner; Fenusa pusilla
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Birch Leaf Miner Mines
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Birch Leaf Minerand Egg Laying Sites
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Hawthorn Leaf Miner (Sawfly)
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Native Holly Leaf Miner(Serpentine Mine)
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Oviposition Scarsby Native Holly Leaf Miner
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Inkberry Holly Leaf MinerPhytomyza glabricola
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Adult Black Locust Leaf Miner
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Vegetable Leaf Miners
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Flea Weevils - Defoliate and Mine
Magnolia Flea Weevil
Elm Flea Weevil
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Photo by Steve Mayer
Adult feeding
Leaf mining
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Elm Flea Weevil Orchestes alni
First found in 2003 in multiple locations
of Midwest including West Lafayette
OW adults emerge in May to feed on
Elms through early June
Eggs laid in leaves produce June mines
Adults emerge in late July and feed on
leaves till they overwinter.
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Adult EuropeanPine Shoot Moth
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European Pine Shoot Moth Damage
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European Pine Shoot Moth