Ausable Bayfield Conservation Authority (ABCA) staff, while working in forests … Scrape egg masses into a bucket or similar container filled with soapy water, or burn or bury the egg masses. Thes photographs were taken in Burlington County, NJ during the spring of 2007. kurstaki) to protect landscape trees from severe defoliation. Gypsy moth overwinters as egg masses of 100-1,500 eggs on tree trunks and the undersides of branches and bark. Right – Gypsy Moth Caterpillar) In July, the adult moths (white or grey) lay their eggs in the form of a fuzzy pink-to-white oval masses of about 1.5” inches, along the branches and trunks of a host tree. No! The majority of the feeding occurs during the night. Image. Wrapping tree trunks with aluminum foil covered in a sticky substance, recommended by some sources, has proven to be ineffective and is not good for the health of the trees; you may entrap large numbers of caterpillars, but not nearly enough to curtail the damage. You can spray Bt yourself or hire a professional arborist or tree care service to spray trees. This population collapse usually is the result of a virus disease called NPV that affects gypsy moth caterpillars. The female gypsy moths nests by laying large egg masses in the trees, which can eventually contain more than 1,000 eggs. Over the next one to two weeks, the caterpillars develop into moths, a process called pupation. This information is for educational purposes only. They can survive temperatures 20 to 30 degrees below zero Fahrenheit. Link to larger image. This foliage-feeding insect, which is native to Europe, was introduced into Massachusetts in 1869 by a misguided naturalist. They may also be found in protected … Don’t leave the eggs or bits of egg mass on the ground – those eggs can often hatch the following spring. Host species. The gypsy moth has one generation per year in Pennsylvania. Every spring eastern tent and gypsy moth caterpillar seem to appear out of nowhere to feed on the leaves of our Michigan trees. It is best to apply any insecticide when caterpillars are young to limit defoliation. Gypsy moth females lay between 500 to 1,000 eggs in sheltered areas such as underneath the bark of trees. Female gypsy moth and egg masses. Adult moths emerge from cocoons, usually in July or early August. Severe defoliation does stress the tree, but trees can usually tolerate even complete defoliation for a few years. Since then, gypsy moth has become established in all Michigan counties and most of the state has experienced one or more gypsy moth outbreaks. The gypsy moth female lays between 500 to 1,000 eggs in tree bark crevices. For directions on how to do a predictive survey, woodlot owners can refer to Guide to Predicting Gypsy Moth Damage(FR-156). Reference to commercial products or trade names does not imply endorsement by MSU Extension or bias against those not mentioned. Other types of insecticides are injected into the base of the trunk of a tree. On Sunday, Bob Taylor showed the damage gypsy moths are doing to the trees on their 32-acre property. The scientific name for a gypsy moth is Lymantria dispar. What You Can Do. On potato plant leaves. For those who may be allergic to gypsy moth caterpillars, you should minimize contact with the insect by wearing long-sleeved shirts and by drying clothes indoors during an outbreak. Although these caterpillars are close to being out of our hair for another year (they’ll stop feeding soon), there are still a few steps you can take this year and next year to protect your trees. Fall webworm (Hyphantria cunea F), another native insect, feeds in late summer and fall on many different species of hardwood trees. Gypsy moth outbreaks occur every 7 to 10 years. The egg sack is unique and looks like a fuzzy patch, about the size of a … A 15 Gypsy moth larvae will feed on some species of Christmas trees (e.g. They eat more than 500 species of plant life, which makes their control essential. In the fall and winter, inspect your property, including woodpiles, stone walls, and lawn furniture for egg masses. One year of defoliation is not likely to kill your trees. The abundance of large, hairy caterpillars and the resulting rain of frass (fecal pellets) from infested trees is unpleasant and can be distressing, especially for people who have not experienced a gypsy moth outbreak before. If trees are affected by other stress factors such as severe drought, disease or poor growing conditions, there is a greater chance severe defoliation will lead to mortality. Prevention. Egg masses may be small, about the size of a quarter, or up to 3 inches long. On tree … Gypsy moths have a simple life cycle. 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