Scientists applied permethrin to dirt and afterwards planted sugar beets, wheat, lettuce as well as cotton in the soil. Scientists located trace amounts of the permethrin deposit in the edible components of the plants at 30 and also 120 days after planting. Trace quantities of permethrin have actually been discovered in foods including bananas, collard environment-friendlies, squash and also watermelon. Nonetheless, much less than 1% of the more than 1,700 food examples examined had observable degrees of permethrin.