Insect Defoliators of the Southeastern United States Forest
- Slides: 37
Insect Defoliators of the Southeastern United States Forest Health Guide for Georgia Foresters Terry S. Price – Entomologist http: //www. gfc. state. ga. us
Hardwood Defoliators Greenstriped Mapleworm Orangestriped Oakworm Spiny Oakworm Buck Moth Oak Skeletonizer Forest Tent Caterpillar Eastern Tent Caterpillar Catalpa Sphinx Walnut Caterpillar Variable Oakleaf Caterpillar Gypsy Moth Locust Leafminer Larger Elm Leaf Beetle Japanese Beetle Yellow Poplar Weevil
Lepidoptera Oakworms in the genus Anisota, are common throughout the South and do considerable damage in forest and landscape trees. Common species are the orangestriped, pinkstriped and spiny oakworms
Orange Striped Oakworm Feed on various oaks and sometimes birch and hickory.
Spiny oakworm
The greenstriped mapleworm, prefers maples but will feed on boxelder and oaks
Buck moth larva The buck moth feeds primarily on oaks.
The oak skeletonizer
Oak Skeletionizer Damage
The oak skeletonizer was responsible for extensive defoliation of chestnut oak over a 300, 000–acre area in North Georgia from 1986 to 1999
Note key-hole shaped spots Forest Tent Caterpillar Forms no tent, feeds on many species
Eastern Tent caterpillar
Catalpa sphinx moth.
Feeds on walnut, butternut, pecan, hickory. Walnut caterpillar
Variable Oak caterpillar
Coleoptera - Hardwoods Locust leaf miner – nymph, larva and adult
The larger elm leaf beetle
The Japanese beetle
Conifer Defoliators Spotted Loblolly Pine Sawfly Virginia Pine Sawfly White Pine Sawfly Slash Pine Sawfly Hetrick's Sawfly Warren's Sawfly Blackheaded Pine Sawfly Red-Headed Pine Sawfly Abbott's Sawfly Introduced Pine Sawfly Loblolly Pine Sawfly Pine Webworm Pine Colaspis Beetle Pine Chafer Beetle Evergreen Bagworm
Sawflies
Black headed sawfly
Lepidoptera - conifers Pine webworm
Everygreen bagworm
Pine Colaspis beetle Coleoptera (Conifers)
Pine Colaspis beetle damage
Pine Chafer Beetle
Stinging Caterpillars that occur in Southern US Saddleback caterpillar
Hag Moth Caterpillar
Puss Moth Caterpillar. Most dangerous of the Stinging caterpillars – symptoms may last 12 hours
IO Moth Caterpillar
Stinging Rose Caterpillar
Mimicry – pretending to be something your not so as to keep from being eaten.
Questions to answer for Insect Defoliators: 1) How do polyphagous, oligophagous and monophagous defoliators differ? 2) How is the presence of a defoliator detected and evaluated? 3) Describe the basic life cycle of the spruce budworm. In what part of the U. S. is this insect a problem? 4) Describe the basic life cycle of the gypsy moth. What is the potential of this insect becoming a problem in Alabama? 5) Describe the basic life cycle of the Douglas-fir tussock moth. Where is this insect a problem? 6) How do humans contribute to the spread of Gypsy Moth in the United States? What is one major difference between the Gypsy Moth and the Asian Gypsy Moth. 7) What is ‘Disparlure’ and what is its role in integrated pest management? 8) Why is damage by the Douglas-fir Tussock moth generally more serious than that caused by the Gypsy Moth? 9) Why would foliage feeding insects generally be more important in the Southern Region than in some other parts of the U. S. ? 10) Why are native defoliators generally less of a problem than those introduced from other countries?
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