Gypsy moths numbers are rising in southern Michigan

Gypsy moths are an invasive species, a term for non-native pests that can cause harm to native species and ecosystems. In its caterpillar life stage, the insect caused widespread defoliation in Michigan from the mid-1980s to the early 1990s. A large population in 2018 has led to more caterpillars hatching this spring.
Current defoliation is heaviest in Barry, Ionia and Washtenaw counties, but Department of Natural Resources forest health experts say it’s likely that gypsy moth caterpillars are causing similar problems on a local scale in other areas of the Lower Peninsula. Heavy defoliation likely will become visible within the next few weeks in localized outbreak areas and persist through mid-July.
“Gypsy moths rarely kill trees in Michigan,” said James Wieferich, DNR forest health specialist. “Only stressed trees suffering from problems like drought, old age or root damage are at high risk. In most cases, gypsy moth caterpillars are more of a nuisance in residential areas than in the woods.” Read more








