研究了咪唑类药剂抑霉唑和双胍类药剂百可得在柑桔中的残留情况。结果表明 ,供试的两类药剂在柑桔中的降解符合一级动力学方程 ,其半衰期分别为 80 .5～ 95.6d和 4 5.4d ,并提出了它们在柑桔上合理使用的准则。 Residues of imazalil, a biguanide and a biguanide, were studied in citrus. The results showed that the degradation of the two agents tested in citrus was in accordance with the first-order kinetic equation, and their half-lives were 80.5-95.6d and 5.45d, respectively. The criteria for their rational use in citrus were also proposed.