Corn earworm/bollworm update for August 26, 2021

Captures of corn earworm (=bollworm) moths decreased this week in our black light traps. The average number of moths caught per night was: Dinwiddie = 2; Greensville = 6; Prince George-Templeton = 1; Prince George-Disputanta = 2; Suffolk = 13. Here is the Table. In our unsprayed, conventional (non-Bt) cotton plots at the Tidewater Agricultural Research and Extension Center in Suffolk, we had 11% boll injury due to bollworm feeding this week. Adult cypermethrin (pyrethroid insecticide) vial tests have 29% moth survival with 796 moths tested in 2021.