Abstract: The study on dynamics of Bamanling residual in apples revealed that in 1995 and 1996 the primal accumulation of Bamanling were 0.470 and 0.761 mg/kg and its half life degradation period were 2.5 and 3.5 days respectively, showing a similar dynamic trend. Two treatments with different application rates and application times were designed (twice application of recommended dosage 2 000∶1 and three times application of higher dosage 1 000∶1). 14 days after the applications, the residual of Bamanling in the apples were 0.098 mg/kg and 0.132 mg/kg, both being well below the 1 mg/kg limit specified by FAO/WHO and, therefore, safe to humans.

Key words: apples, Bamanling, residual