克草胺为氯代乙酰胺除草剂 ,Ａｍｅｓ法、枯草杆菌重组、骨髓微核以及睾丸染色体畸变等试验均为阴性 ,而小鼠精子畸形试验为阳性 ,为此进一步作了繁殖试验。克草胺体积分数为 95 % ,5周龄清洁级小鼠雄 6 0只、雌 12 0只作为亲代 ,在屏障系统内进行两代繁殖试验。1　方法按ＬＤ5 Herbicide chloroacetamide herbicide, Ames method, Bacillus subtilis recombinant, bone marrow micronucleus testicular chromosomal aberration and other tests were negative, and the mouse sperm abnormality test was positive, for which further breeding test. The volume fraction of kresoxim was 95%. Sixty clean mice of 5 weeks age and 120 females were used as parents to conduct two generations of breeding experiments in the barrier system. 1 method by LD5