Without getting in too deep, a lot of pesticides we use degrade in sunlight and/or water. So as long as it isn't sprayed near the end of harvest, where it would

Without getting in too deep, a lot of pesticides we use degrade in sunlight and/or water. So as long as it isn't sprayed near the end of harvest, where it would then be stored in a dark dry place, most agricultural chemicals will have degraded.