Study on the Residues of Pesticides in the Soil of Tea Garden in Sichuan

In this study,the residues of the 14 kinds of pesticides usually using in tea garden in 423 soil samples of the tea garden were determinated in Sichuan.The results showed that: the 14 kinds of pesticide had all been checked out.The detection rate of organochlorine pesticides were25.24%,the detection rate of HCH and DDT were 7.38% and 10.00% respectively.The detection rate of dicofol were 10.71%,the residues in 24 soil samples were big than 1.0 mg·kg-1 and the max residues was 1.519 mg·kg-1.The detection rate of organophosphorus pesticides residues were also high,the number of detection was 150 and the detection rate was 35.64%.The detection rate of isocarbophos was 9.22% and the max residues was 0.062 mg·kg-1.The detection rates of methamidophos and monocrotophos fenvalerate were all 17.09%.The detection rate of pyrethroid pesticides was 10.24%.The detection rate of fenvalerate was 5.00% and the max residues was 0.312 mg·kg-1.The residues of pesticides in soil had evident difference in different areas.