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农药的生物筛选和毒力测定需要选用对杀虫剂敏感的昆虫虫种,并要求被测试对象对杀虫剂的反应尽量一致(即具有稳定的遗传因子).因此,获取具有稳定遗传因子的敏感品系是农药筛选的第一步,利用苜蓿蚜能孤雌生殖的特性,通过室内多次选育和药剂筛选,培育出相对较纯的、对药剂敏感的苜蓿蚜.
Biological screening and virulence determination of pesticides need insecticidal insecticide insecticide selection and require the test object to pesticide reaction as much as possible (that is, with a stable genetic factor.) Therefore, access to a stable genetic factor Sensitive strains are the first step of pesticide screening. By using the characteristics of parthenogenesis of alfalfa aphids, the relatively pure and drug-sensitive alfalfa aphids were bred by indoor breeding and screening.