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Pesticide resistance is the ability of a pest population, such as insects, fungi, weeds or rodents, to evolve a tolerance to a pesticide that it was previously susceptible to. Retrieved from http://en.wikipedia.org/wiki/Pesticide_...
Pesticide resistance is increasing. Farmers in the USA lost 7% of their crops to pests in the 1940s; over the 1980s and 1990s, the loss was 13%, even though more pesticides were being used. Over 500 species of pests have evolved a resistance to a pesticide.