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目的了解乐都区温室蔬菜中有机磷农药现状。方法 2014年8月用梅花形抽样法抽取乐都区5个乡镇温室蔬菜样品106份,利用气相色谱-质谱法进行有机磷农药的残留量检测。结果检出44个有机磷农药残留样品和28个超标样品,检出率和超标率分别为41.51%和26.42%,且差异均有统计学意义(χ~2=7.007,P<0.05;χ~2=7.857,P<0.05),检出国家明令禁止的高毒禁用农药,检出率达13.21%,农药联合使用情况较为普遍。结论乐都区温室蔬菜有机磷农药使用普遍,检出率和超标率高,仍有违规使用高毒禁用农药和联合使用有机磷农药情况。
Objective To understand the status of organophosphorus pesticides in greenhouse vegetables in Ledu District. Methods In August 2014, 106 samples of vegetable in greenhouse of 5 villages and towns in Ledu district were sampled by plum blossom sampling method, and the residues of organophosphorus pesticides were detected by gas chromatography-mass spectrometry. Results 44 organophosphorus pesticide residue samples and 28 excess samples were detected. The detection rates and the excess rates were 41.51% and 26.42%, respectively, with significant differences (χ ~ 2 = 7.007, P <0.05; 2 = 7.857, P <0.05). The detection of highly toxic banned pesticides banned by the state was detected. The detection rate was 13.21%. The combined use of pesticides was more common. Conclusion Greenhouse vegetable organophosphorus pesticides are commonly used in Ledu District. The detection rate and over-standard rate are still high. There are still cases of banning pesticides and using organophosphorus pesticides in violation of regulations.