Last week the question was: What caused the wart-like growth on the inner wall of this cotton boll?
This is classic stinkbug damage. When we see this, we frequently see discolored lint also. It’s nearly impossible to tell whether you have stinkbug damage unless you tear apart some bolls and look inside, so proper scouting is key. For information on scouting and thresholds, check out page 112 of the SC Pest Management Handbook.
Here is another cotton related question for this week: What is this on the underside of this cotton leaf?