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3R是抗性（resistance）、再猖獗（resurgence）和残留（residue）3个词的第一个字母。使用化学农药后，3R成为全世界公认的、亟待解决的难题。而且由于这3个R是常常互相关联，互为因果的，放必须统一解决。抗性是指生物长期接受药剂处理使其后代产生抗药性。长期使用单一品种
3R is the first letter of the three words resistance, resurgence and residue. After the use of chemical pesticides, 3R has become the world’s recognized and urgent problems to be solved. And since these three Rs are often interrelated and mutually causal, they must be resolved in unity. Resistance refers to the biological treatment of long-term agents to make their offspring resistant. Long-term use of a single species