| Cowpea cultivation is widespread in our country,but also many pests,including armor cyanogen chrysanthemum ester and deltamethrin is farmers tend to use pesticides pesticides in recent years,but at present in the rule of rational use of pesticides,and no of cowpea sense of cyanide chrysanthemum ester and deltamethrin security clearances have specific provision,and the pesticide residue limits standard GB2763,There is also no specified MRLs for fenpropathrin in legumes,and only the MRLs for deltamethrin in legumes are0.2mg/kg.This topic mainly studies armor cyanogen chrysanthemum ester and deltamethrin residue in cowpea and relationship between the dynamic change of harvest time after applying pesticide,including field implementation,laboratory tests,the results of calculation and analysis,a part of the analysis and calculation of experimental results,obtained a cyanide chrysanthemum ester and deltamethrin in five time points corresponding to three kinds of processing mode of pesticide residues as a result,The armor cyanogen chrysanthemum ester residues in cowpea in 7 days after applying pesticide is2.207 mg/kg,than cabbage in cowpea maximum residue limits of 0.5 mg/kg is much higher,and later also need to use more rigorous experiments to determine the armor cyanogen chrysanthemum ester in cowpea maximum residue limits to reoccupy experimental method to explore their security clearances in cowpea,The residue of deltamethrin on the third and fifth days after application was 0.467 mg/kg and 0.183 mg/kg,respectively,while the maximum residue limit of deltamethrin in cowpea was 0.2 mg/kg,so the safety interval of deltamethrin in cowpea could be preliminarily determined to be 5 days.Among the three simple home treatment methods,the residues of fenpropathrin and deltamethrin in cowpeas washed with water for 4 times were lower than those in cowpeas treated without any treatment and soaked with water for 2 hours.Therefore,the best treatment method to reduce pesticide residues in cowpeas in this project was washed with water for 4 times.At the same time,based on the data of rapid detection results of pesticide residues in Xiangtan County in recent years,this project reflects that at present,highly toxic pesticides have been gradually controlled and abandoned by the vast majority of farmers.Middle-low toxic pesticides and green and environmentally friendly pesticides are the trend of agricultural development in the future.In this paper,based on the results of the experimental research combined with various practical situations,the causes of pesticide residues in agricultural products existing in our lives were analyzed and the countermeasures to deal with this problem were elaborated. |
