Boll Weevil is still going on, although I believe it's been 5 years since one has been found here on the Upper Gulf Coast in Texas. Cotton farmers still get charged $20/ac so the program can recoup losses from when the program was still very active, only the govt can get away with that kind of accounting. To the surprise of many, the program worked and the results have been very impressive.
I showed this video to a 2nd generation crop duster buddy of mine a while back. He used to go with his Dad to another crop duster's operation to visit from time to time, and the quiet, sincere, owner of the operation was occasionally there, usually sweeping out the hangar or making himself busy. Turns out that was Sam Walton's brother, he owned several operations throughout the south.