How to Kill a Boll Weevil?
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There are two ways - spray with pesticide, but this is dangerous or the United States Department of Agriculture has a program to eradicate all boll weevils and so far they have managed in many states.
jillou, Answers Expert
Then again, this answer might help you...
Killing a boll weevil is probably as easy as stepping on it, but the cotton growers have or had a much larger problem with them and use insecticides. They apply the insecticides four to five times during the growing season.
scidneg, Answers Expert