Ornamentals Insect and Mite Update – 2002-03 David J. Shetlar, Ph.D. The “BugDoc” The Ohio...
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Transcript of Ornamentals Insect and Mite Update – 2002-03 David J. Shetlar, Ph.D. The “BugDoc” The Ohio...
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Ornamentals Insect and Mite Update – 2002-03
David J. Shetlar, Ph.D.The “BugDoc”
The Ohio State University, OARDC & OSU Extension
Columbus, OH
© October, 2002, D.J. Shetlar, all rights reserved
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Ornamentals Insect and Mite Update – 2002-03
Information resources Pest activity review Life after FQPA??!!
Alternate insecticides
Alternate miticides
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http://ohioline.osu.edu
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Check OSU FactSheets - quarterly
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Bulletin 504 – to be revised by February, 2003
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http://webgarden.osu.edu/
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BYGL OnLine – weekly update of Ohio nursery, landscape and turf pests
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The P.E.S.T. Newsletter
available from:
Ohio Nursery & Landscape Association72 Dorchester SquareWesterville, OH 43081
614-899-1195800-825-5062
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Come visit the BugDoc at:
http://bugs.osu.edu
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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 ?
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Photo: A. J. Storer
Photo: D. Roberts
Emerald Ash Borer
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Photos: Cornell University
Viburnum Leaf Beetle
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Borers Continue – Agrilis species
Bronze birch borer
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Borers Continue – Agrilis species
Honeylocust borer
Twolined chestnut borer
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Borers Continue – Flatheaded Appletree Borer
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Borers Continue –Clearwing borers
Rhododendron borer
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Borers Continue – Bark Beetles – mainly conifers
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Asian Ambrosia Beetle – “toothpicks”
Photos: bugwood
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Borers Continue – White Pine Weevil – white pine & SPRUCE
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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
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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.
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Caterpillars – The Gypsy Moth
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Caterpillars – Fall Webworm, Mimosa Webworm, Bagworm
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Caterpillar Insecticides
Traditional• Dursban• Sevin• Orthene• Malathion
Alternatives• Tempo, Talstar,
Deltagard, Scimitar, Astro
• Conserve• Bt• Soaps or Oils
X
?
X
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Cool-Season Pests – Spruce Spider Mite – inactive most of summer!
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MiticidesTraditional• 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
??
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Pine tortoise scale mature females on stem.
Pine needle scale second instar nymphs and male “pupae” on needles.
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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.
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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
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Black Vine Weevil ManagementWhat’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!)