Analysis on pesticide residues in vegetables in Zhenhai district of Ningbo

Objective:To investigate the conditions of pesticide residues in different seasons in Zhenhai district in order to provide inspection basis for assuring the safety of vegetable intake.Methods: In 2010 year,344 samples of vegetables were randomly collected from vegetable production base,production of vegetables around the famers and vegetables market in Zhenhai district.The vegetables were random sampling in accordance with leafy vegetables,stem vegetables,root vegetables,cauliflower classes and fruit vegetables categories in different seasons,and measured 14 organophosphorus pesticides and 6 pyrethriod pesticides by GC.Results: The detection rate of pesticide residues in all vegetables was 7.85%,and over-standard rate was 3.78%.The detection rate of Vegetable Production Base was 3.27%,which was lower than famers(8.20%) and vegetable market(11.54%),and over-standard rate was 0.65% which also was lower than famers(4.92%) and vegetable market(6.92%).In 20 kinds of pesticides,the detection rate of chlorpyrifos and cypermethrin was higher than other pesticides.The detection rate of leafy vegetables was 11.34%,and over-standard rate was 8.24% which is higher than other vegetables categories.There was no significant difference among different seasons in our research.Conclusion: In order to assuring the safety of vegetable intake,the effective measures should be taken.It is necessary that the inspection and administration should be strengthened,and the use of high toxic pesticides should be prevented from the source,and the monitoring on vegetables between planting and sale links should be enlarged.