Ticks and chiggers are really bad here. I treat clothes with Permanone. It comes in an aerosol can and is sold at most farm stores here.Amazon sells it.
It is permethrin made for spraying on clothes. Sawyers is permanone.
It is the best tick repellent anyone knows of here. All the farmers in the hills treat their clothes with it. It isn't absolutely reliable but it works better than mosquito repellents.
