Other fields have plenty of squares in the top and could easily support another generation of worms. Aphids and whiteflies are building in some fields. These populations need to be watched carefully, particularly as bolls begin to open, to avoid sticky cotton. The aphid fungus should re-establish itself and hopefully eliminate this potential problem. As for whiteflies, treatment is probably not needed unless there is honeydew accumulating on plant surfaces.
Spider mites are another spotty problem.
I have difficultly assessing the potential damage that may be caused by this pest. In short, your guess is as good as mine. I would not treat for spider mites until at least one-half the leaves in the upper canopy are infested, and there is obvious signs of damage. The second go-round of weevil eradication sprays is nearly complete. The program has gone relatively smoothly, but rain and some mechanical problems threw it off track in some locations.