Guess The Pest! July 26th
David Owens, Extension Entomologist, owensd@udel.edu
Congratulations to Bob Leiby for correctly identifying the plant stages in last week’s GTP challenge. Why were they included? R4 soybean – full pod. This stage is most susceptible to stink bug and corn earworm damage. Corn earworm though flies into flowering beans – R2-R3 to lay eggs. R6 soybean – full seed. This is when stink bugs begin doing less on yield impact but more on quality. It is also when defoliation thresholds begin increasing again. We are almost there. Black Layer in corn – physiological maturity.
