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foliage, caterpillars crawl everywhere and their droppings rain from the trees. When disease kills the caterpillars in large numbers, as often happens, the stench is overwhelming. In rare cases, people develop an allergy to the hairs of gypsy moth caterpillars.
Various control measures are available to landowners, but only chemical insecticides are consistently effective in reducing the problems posed by large numbers of caterpillars. Some people object to the use of these poisons. “Biological” control measures, such as the application of virus or a bacterium, which infect and kill the caterpillars, or the encouragement of parasites, which attack and kill caterpillars and pupae, are less effective in prevening defoliation or in reducing the nuisance problem when large numbers of gypsy moth caterpillars are present.
For more information contact the Virginia Department of Forestry at 948-5341, or the County Extension Office at 675-3619.
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