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Wed, Mar 08



Spongy Moths: What to Expect in 2023

What can we expect this year? Join us for a free webinar to find out!

Spongy Moths: What to Expect in 2023
Spongy Moths: What to Expect in 2023

Time & Location

Mar 08, 6:00 PM


About the event

Spongy moth (formerly known as gypsy moth) populations increased dramatically in 2022 causing many home and property owners concern about their trees. You may have noticed the spongy moth caterpillars crawling over everything last year, especially in May and June. These caterpillars have distinctive red and blue dots on their backs, long hairs, and are voracious eaters, eating the leaves of many trees. The caterpillars cause the most damage to trees and are the biggest nuisance to people. Come July, they form cocoons, pupate, turn into adult moths, lay eggs and die. Those eggs overwinter and soon enough, those caterpillars will be hatching again, to eat and eat and eat!

What can we expect this year? Join us for a free webinar to find out! On March 8, 2023, at 6:00 p.m. Mike Hillstrom, Forest Health Specialist from the Wisconsin Department of Natural Resources (DNR) and PJ Liesch, Entomologist and Director of the University of Wisconsin Insect Diagnostic Lab, will discuss spongy moths and what to expect in 2023. You will learn where spongy moth defoliation occurred and a variety of management options to reduce damage from spongy moths for urban, wooded residential and forest landowners.

This is a free webinar, but registration is required. The webinar will be recorded for later viewing.

Please visit to register!

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You can also learn more about spongy moths and what you should do at the following website:

If you have questions about this webinar, please contact Julie Hill, Horticulture Outreach Specialist at julie.hill@wisc.eduor by calling the UW-Extension Walworth County office at 262-741-4958.

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