Spongy Moth Update

Spongy Moth (Lymantria dispar dispar) – formerly known as gypsy moth – is a forest pest responsible for causing significant tree mortality and defoliation across the state. In 2021 & 2022 there were high populations and heavy impacts in central & northcentral PA, the trend continues in 2023. This year, spongy moth have been detected in Pike County.

The best way to protect against these pests is via aerial spraying. The DCNR Bureau of Forestry will treat over 290,000 acres by aerial application of insecticide this spring. DCNR encourages all land owners to set up their own private spray program.

If you are interested in setting up your own private spray program, please refer to the links below:

• Guide to Conducting a Private Spongy Moth Suppression Program
• Aerial Applicators Licensed to Work in Pennsylvania
• Service Forester to each county
• Guide to Spongy Moth Egg Mass Surveying

Additional Resources
DCNR to Begin Spraying Forests in Spongy Moth Suppression Effort Press Release
DCNR Interactive Spongy Moth Map
PA Game Commission Spongy Moth Spray Map for 2023