Home / Environment / PA Forests Battle Back From Moth Infestation
PA Forests Battle Back From Moth Infestation
10 May
Summary
- Pennsylvania's targeted aerial treatment for moths is significantly reduced in 2026.
- Spongy moth impact has declined, with over 75,000 fewer acres treated this year.
- Aerial treatment for fall cankerworms will cover 5,345 acres in Forbes State Forest.
Pennsylvania is undertaking targeted aerial treatments across state woodlands to combat spongy moth and fall cankerworm populations. The Department of Conservation and Natural Resources (DCNR) aims to prevent spring outbreaks. This year's plan significantly reduces affected acreage, with only about 3,100 acres targeted for spongy moth treatment, a steep decline from previous years.
Spongy moth infestations have threatened native oak forests, but suppression efforts are showing positive results. Fall cankerworm treatments will cover 5,345 acres in Forbes State Forest. These combined efforts are crucial for protecting stressed forests that have recently endured pest damage and drought.
The treatments utilize Bacillus thuringiensis subsp. Kurstaki (BtK), an insecticide ingested by young caterpillars. This targeted approach minimizes defoliation, preventing trees from succumbing to disease or other stressors. Aerial application will be conducted using helicopters in areas identified through surveys indicating increasing pest populations.
