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
Ornamentals Insect and Mite Update – 2002-03
Information resources Pest activity review Life after FQPA??!!
Alternate insecticides
Alternate miticides
http://ohioline.osu.edu
Check OSU FactSheets - quarterly
Bulletin 504 – to be revised by February, 2003
http://webgarden.osu.edu/
BYGL OnLine – weekly update of Ohio nursery, landscape and turf pests
The P.E.S.T. Newsletter
available from:
Ohio Nursery & Landscape Association72 Dorchester SquareWesterville, OH 43081
614-899-1195800-825-5062
Come visit the BugDoc at:
http://bugs.osu.edu
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!
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
??
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 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!)
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