In spite of present chemical control methods, an estimated 33% of current U.S. crop production is lost to crop pests. An analysis of the effects of removing chemical pesticides from U.S. agriculture reveals that pest losses would increase an estimated additional 9%. An investment of about $2.2 billion in pesticides would rescue an estimated $8.7 billion in crops from pest destruction
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Pimentel et al. (1978) studied this question.
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