Corn earworm trap in Montgomery County, PA. Photo: A. Frankenfield, Penn State
Corn earworm (CEW) counts continued to increase. Counties along the west, south, and eastern portions of PA were at a 4-5 day spray interval. Counties more towards the center of the state were a bit lower, at a 5-6 day interval. Counts in other parts of the US are also increasing, and counts can change rapidly at this time of year.
European corn borer (ECB) counts are low, but one site in northeastern PA had a marked increase within the last few days.
Fall armyworm (FAW) counts are high in Erie County, and sites in the mid-central portion of the state showed plant damage in the presence of low counts.
Reproductive (tassel/silk) and late vegetative corn attracts moths. Shorten spray schedules when populations increase.