Gypsy Moth (Lymantria dispar L.) is the most serious insect pest of hardwood trees in United states. In the 80 and 90, the gypsy moth defoliated more than a million acres each year in the eastern. Infestations alternate between years of little defoliation followed by periods of 2 to 4 years of heavier defoliation when gypsy moth populations are heavier. Of late infestations have been considerably reduced.
Gypsy moth caterpillars feed on most hardwood trees, except ash. They prefer oak, poplar, gray birch and fruit trees. When half grown or larger, the larvae are also likely to feed on evergreens. Continue reading »