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After many years of applying the selective pesticide provironex, a farmer notices that the applications seem less effective. This is likely due toa. The fact that provironex is fat soluble and has been bioaccumulatingb. Provironex is selective, so other pests are filling the niche from the exterminated onesc. Provironex is persistent, and the farmer should apply less for better resultsd. The target species has begun to evolve resistancee. Provironex is a wide spectrum pesticide that needs to be fine tuned for the target species
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