TBW has a tooth-like projection or retinaculum. CEW does not possess a retinaculum. We have recently posted some images of TBW and CEW mouthparts on a website at gaipm.org which should help in distinguishing these two species. Species identification can be of benefit particularly when troubleshooting poor performance of an insecticide. Large CEW larvae have been reported from some Bt cotton fields in southwest Georgia.
Pressure is light to moderate but some fields have required treatment.
Recommended scouting procedures are the same for both Bt and non-Bt cotton. However, scouts should be sure to monitor blooms and bloom tagged bolls closely in Bt cotton. If any damage is observed, the entire plant should be searched for larvae. A significant portion of the cotton acreage falls into this category. Some fields have been treated for stink bugs.