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Residue of ZJ0273 in Soil and Its Effects on Following Crops

FU Qun-mei1,DONG De-zhen2,LU Long1,CHEN Jie2,LIU Yan-jun2,TANG Qing-hong1(1.Shanghai Institute of Organic Chemistry,Chinese Academy of Sciences,Shanghai 200032,China;2.Zhejiang Chem-tech Group Co.,Ltd.,Hangzhou 310023,China)  
Studies were conducted on degradation patterns of ZJ0273 in soils of rape fields in Hebei and Hubei,and the sensitivities of following crops to ZJ0273 were tested in laboratory under simulated condition.The results showed that the degradation of ZJ0273 in soils was quick,and the half lives were 12.2 and 10.9 days in Hebei and Hubei,respectively.The residue was below 0.01 mg/kg in soils of two above trial fileds after rape havest.All the tested following crops had quite different sensitivity to ZJ0273.Among which eggplant,pumpkin,pepper,maize and cotton were more sensitivie and the ED10 values of stem length were 0.0262,0.0353,0.0415,0.0422,0.0456 mg/kg,respectively.Rice,peanut,soybean and cowpea had highly endurance to ZJ0273 and the ED10 values of stem length were 0.1471,0.6617,9.090,21.091 mg/kg,respectively.So the residue of ZJ0273 is less harmful to the following crops.
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