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Gypsy Moth
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son,” Mr. Williams explained. The strain to bear a second set of leaves once the caterpillars have molted is often too much for older, diseased and drought-stricken trees to tolerate. These are the trees most at risk from gypsy moth infestations.
“The moths prefer oak trees," the extension agent added. "They will defoliate the oaks before moving on to another tree.”
With no natural predators and with no pesticides which have proven completely effective in stopping the spread of gypsy moths, careful and continuous treatments against the pest are the only effective line’ of defense.
"The time to kill the pests is when they are in their larval stage," Mr. Williams said, pointing to one black larva preserved in a test tube. "The moths do not eat the trees -it’s the larva. ”
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