Ornamentals Insect and Mite Update – 2002-03 David J. Shetlar, Ph.D. The “BugDoc” The Ohio State University, OARDC & OSU Extension Columbus, OH © October,

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Presentation transcript:

Ornamentals Insect and Mite Update – David J. Shetlar, Ph.D. The “BugDoc” The Ohio State University, OARDC & OSU Extension Columbus, OH © October, 2002, D.J. Shetlar, all rights reserved

Ornamentals Insect and Mite Update –  Information resources  Pest activity review  Life after FQPA??!! Alternate insecticides Alternate miticides

Check OSU FactSheets - quarterly

Bulletin 504 – to be revised by February, 2003

BYGL OnLine – weekly update of Ohio nursery, landscape and turf pests

The P.E.S.T. Newsletter available from: Ohio Nursery & Landscape Association 72 Dorchester Square Westerville, OH

Come visit the BugDoc at:

Insect and Mite Activity in 2002 Still suffering from borers because of plant stresses – mainly drought (Agrilis borers, flatheaded appletree borer, bark beetles, white pine weevil) Sucking pests – lace bugs, scales, spider mites Caterpillar/sawfly complex changes New Pests Detected – Asian emerald ash borer ?; viburnum leaf beetle in Ohio; Asian longhorn beetle ?

Photo: A. J. Storer Photo: D. Roberts Emerald Ash Borer

Photos: Cornell University Viburnum Leaf Beetle

Borers Continue – Agrilis species Bronze birch borer

Borers Continue – Agrilis species Honeylocust borer Twolined chestnut borer

Borers Continue – Flatheaded Appletree Borer

Borers Continue – Clearwing borers Rhododendron borer

Borers Continue – Bark Beetles – mainly conifers

Asian Ambrosia Beetle – “toothpicks” Photos: bugwood

Borers Continue – White Pine Weevil – white pine & SPRUCE

Borer Insecticides Traditional Dursban Lindane DiSyston (disulfoton) Cygon (dimethoate) Bidrin injection Orthene injection Alternatives Tempo, Talstar, Deltagard, Scimitar, Astro Merit injection (beetles only!) ??? X X ?? X X

Borer Control Approaches Cultural – Use plants that are not prone to borer attack! Plant health care – plants in good growing conditions can usually repel borer attacks. Avoid Plant Damage – damaged plants are prone to attack. Biological – Usually not effective because they attack after infestation.

Caterpillars – The Gypsy Moth

Caterpillars – Fall Webworm, Mimosa Webworm, Bagworm

Caterpillar Insecticides Traditional Dursban Sevin Orthene Malathion Alternatives Tempo, Talstar, Deltagard, Scimitar, Astro Conserve Bt Soaps or Oils X ? X

Cool-Season Pests – Spruce Spider Mite – inactive most of summer!

Miticides Traditional Kelthane Morestan Cygon Orthene ? Alternatives Avid Hexygon (eggs & larvae only, spider mites only) Floramite (spider mites only) Sanmite (spider mites only) Conserve Pyrethroids?? Soaps or Oils X X ??

Pine tortoise scale mature females on stem. Pine needle scale second instar nymphs and male “pupae” on needles.

Pine needle scale females. Note pinkish eggs at end of scale test (shell) and a settled crawler at upper left. Group of pine needle scale settled crawlers (tan) and a couple of fresh crawlers (pinkish) in color.

Scale Control (crawlers) Traditional Diazinon Dursban Sevin Orthene Malathion Cygon DiSyston (disulfoton) Alternatives Tempo, Talstar, Deltagard, Scimitar, Astro Merit (soft scales) Meridian (Flagship)? Soaps & Oils X X ?? ? X X

Black Vine Weevil Management What’s Lost? Ficam (Turcam) Orthene is on the way out! What are the Alternatives? Merit! (home owner product available, apply to soil, NOT mulch, not for adults!) Pyrethroids for Adults DiSyston (disulfoton) (home owner products available, BVW not named on label, apply to soil!)