Residents Encouraged to Take Preventive Action Against Spongy Moth to Protect Tree Canopy

FOR IMMEDIATE RELEASE

May 6, 2025

Pelham, ON – The Town of Pelham is urging homeowners to take immediate preventative steps to continue to help protect the community’s tree canopy from the destructive impacts of the spongy moth (Lymantria dispar dispar), an invasive species currently spreading in the region.

Spongy moth caterpillars can cause severe defoliation of trees, weakening them and making them more vulnerable to disease and other pests. Homeowners can assist in limiting this damage by adopting simple, effective prevention methods that stop the caterpillars before they reach the treetops. One effective method is to wrap tree trunks with sticky band barriers in May. As young caterpillars climb toward the canopy, they can be intercepted by these sticky bands, significantly reducing their ability to feed on the tree’s foliage. Later in June, caterpillars descend during the day's heat to seek shelter. Homeowners are encouraged to tie folded burlap bands around tree trunks to trap the caterpillars as they gather underneath. Residents should inspect the bands daily, collect any caterpillars, and dispose of them in soapy water.

“Pelham has seen a noticeable reduction in spongy moth populations this year compared to previous seasons, which is a strong indication that the integrated approach — including public participation and targeted treatment — is working,” said Ryan Cook, Public Works Manager for the Town of Pelham. “The goal remains to protect Pelham’s tree canopy from invasive species and to preserve the health of the town’s urban forests.”

In addition to these homeowner actions, the Town will be conducting aerial spraying in Hillcrest Park, where a notable increase in spongy moth activity has been identified. The treatment will be carried out using a twin-engine aircraft between May 12 and June 15, with two applications planned approximately seven days apart, weather permitting. While residential properties are not directly treated, nearby residents may observe helicopter activity. Town staff will be present to manage traffic control during the spraying period. The confirmed spray schedule will be posted on the Town of Pelham’s website and Facebook page 48 hours before the applications.

For additional information on the spongy moth, prevention tips, and the Town’s full invasive species management approach, please visit www.pelham.ca/invasivespecies

-30-

For media inquiries, please contact:

Leah Letford, Communications Specialist | 905-980-6653 | lletford@pelham.ca