Lymantria dispar, formerly gypsy moth, caterpillars feed on the leaves of oaks, aspen, crabapple and many other types of trees. Outbreaks of Lymantria dispar are not frequent but when they occur, it can be unpleasant to live, work or recreate in an affected area. Lymantria dispar caterpillars can be so abundant that many trees will be completely defoliated by early July. Several areas in Michigan experienced Lymantria dispar outbreaks during 2019, and populations may be high in some areas again during summer 2020. The links below provide information about Lymantria dispar, how it affects your trees and options for dealing with this invasive pest.
- Understanding Lymantria dispar:
- Dealing with Lymantria dispar around your home or property
Published on June 10, 2021
Having problems with Lymantria dispar, formerly gypsy moth, this summer? You aren't alone!
Published on April 16, 2021
There were extremely high populations of Lymantria dispar, formerly gypsy moth, during 2020 and we anticipate elevated populations this year. Scout and treat spruce, fir and Douglas fir for gypsy moths.
Published on February 3, 2021
After a 10-year hiatus from high Lymantria dispar, formerly gypsy moth, infestations, populations began to increase in 2019. This year, Michigan is seeing infestations that meet or exceed the height of infestation prior to 2009.
Published on July 31, 2020
Check out the top five hot topics to get your quick answer to what might be happening in your yard or garden.
Published on June 1, 2020
Oaks and many other trees are likely to be defoliated by Lymantria dispar, formerly gypsy moth, this summer in many areas of Lower Michigan.
Published on August 22, 2019
What can I do about Lymantria dispar, formerly gypsy moth? Will Lymantria dispar go away on their own?
Published on May 22, 2019
Answers to frequently asked questions about using Bt products to control Lymantria dispar, formerly gypsy moth, during outbreaks.
Published on May 7, 2019
An update on Lymantria dispar, formerly gypsy moth, white pine bluster rust and winter injury.
Published on May 1, 2019
Localized rainfall patterns can lead to infestations of Lymantria dispar, formerly gypsy moth, caterpillars in Michigan.
Published on June 22, 2018
Entomophaga fungus keeps Lymantria dispar, formerly gypsy moth, populations in check with spring rainfall.