Various kinds of pesticides are applied in tea production to prevent disease, pests and weeds from damaging tea plants. One group of usually used pesticides are organic phosphor pesticide. Organic phosphor pesticide residues in green teas produced in some areas of Zhejiang Province were detected by Gas chromatogram(GC) method in this paper. The results showed that no pesticide residues were found from organic teas. And four tea samples of common teas contained organic phosphor residues, which were dichlorov...