Pestwatch Report

This will be the last reporting week for the PestWatch Program in 2025. Stay tuned for relevant extension talks and events over the winter season. The PestWatch Report will return in the first week of June 2026.

With the sweet corn season winding down, we had just 8 sites reporting this week and all detected corn earworm moths. Counts are highly variable across the state, with low counts in Lancaster, Centre, Clinton, Indiana and York but we continue to see hotspots in Franklin and Lehigh counties. As silking corn becomes less common on the landscape, corn earworm number are expected to be higher at sites with silking corn. Even silks that have started to dry down will receive higher pressure than during mid-season.

Fall armyworm was reported at 7 of 8 monitored sites this week, with high counts in Centre and Lehigh Counties. Fall armyworm larvae feed on the leaves but also the tips and sides of ears and are generally well controlled with the same pesticides used to control corn earworm.

The maps and graphics below will update in real time as reports come in across the state.

Weekly Corn Earworm Trap Catches

Click on a site in the map below to see historical trap catch data for a site relative to catches during the current season. Spray intervals are indicated by the color of the point based on weekly trap catch.

Average Weekly Corn Earworm Catch

The table below shows trap catches for the two most recent weeks. If no data exist for that week, null is reported.

Statewide Corn Earworm Trends

The figure below shows the weekly average trap catch for the current year (bold line) up to the most recent period, as well as the weekly trends for past years.

Weekly Fall Armyworm Trap Catches

Click on a site in the map below to see historical trap catch data for a site relative to catches during the current season. Spray intervals are indicated by the color of the point based on weekly trap catch.

Average Weekly Fall Armyworm Catch

The table below shows trap catches for the two most recent weeks. If no data exist for that week, null is reported.

Statewide Fall Armyworm Trends

The figure below shows the weekly average trap catch for the current year (bold line) up to the most recent period, as well as the weekly trends for past years.