Risk Analysis of Pesticide Residues in Seven Categories of Vegetables

Pesticide residues in vegetables were monitored in order to comprehensively investigate the current status in Zhengzhou,Henan province,in 2010-2012,and to provide the basis for its management.We carried the pesticide residue analysis of 21kinds of vegetables,belonging to seven categories in Zhengzhou vegetable production base.The results showed that among 32pesticides monitored,30kinds were detected from the vegetable samples,and the pesticides with detection rate of more than 5% were deltamethrin,chlorothalonil,triadimefon,procymidone and PCNB.The exceeding rate of pesticide residues had a tendency of Sinusoidal line with seasons,whose tendency from higher to lower was bulb vegetables,green leafy vegetables,brassica vegetables,bean-like vegetables,melon-like vegetables,tuber-like vegetables and eggplant-like vegetables.Meanwhile,the risk factor of omethoate residue was more than 2.5in vegetables,which was thought high risk;and that of chlorpyrifos and phorate was between 1.5 and 2.5,which were thought middle risk;the risk factor of the rest pesticide residues was lower than 1.5,which were thought low risk.