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Gypsy moth (Lymantria dispar L) caterpillars feed on the leaves of oaks, aspen, crabapple and many other types of trees. Outbreaks of gypsy moth are not frequent but when they occur, it can be unpleasant to live, work or recreate in an affected area. Gypsy moth caterpillars can be so abundant that many trees will be completely defoliated by early July. Several areas in Michigan experienced gypsy moth outbreaks during 2019, and populations may be high in some areas again during summer 2020. The links below provide information about gypsy moth, how it affects your trees and options for dealing with this invasive pest.
- Understanding gypsy moth:
- Dealing with gypsy moth around your home or property
News
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Gypsy moth populations are high: What conifer growers need to know
Published on April 16, 2021
There were extremely high populations of gypsy moth during 2020 and we anticipate elevated populations this year. Scout and treat spruce, fir and Douglas fir for gypsy moths. -
Gypsy moth populations explode in Michigan
Published on February 3, 2021
After a ten-year hiatus from high 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. -
Top five summer questions on the MSU Extension Lawn & Garden Hotline
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. -
Gypsy moth caterpillars are out and about
Published on June 1, 2020
Oaks and many other trees are likely to be defoliated by gypsy moth this summer in many areas of Lower Michigan. -
Gypsy moth outbreaks in Michigan
Published on August 22, 2019
What can I do about gypsy moths? Will gypsy moths go away on their own? -
Btk: One management option for gypsy moth
Published on May 22, 2019
Answers to frequently asked questions about using Bt products to control gypsy moth during outbreaks. -
Tree, turf and ornamental plant update – May 7, 2019
Published on May 7, 2019
An update on gypsy moth, white pine bluster rust and winter injury. -
Infestations of gypsy moth increase during drought
Published on May 1, 2019
Localized rainfall patterns can lead to infestations of gypsy moth caterpillars in Michigan. -
Gypsy moth outbreaks may be contained with the help of a little fungus
Published on June 22, 2018
Entomophaga fungus keeps gypsy moth populations in check with spring rainfall.
