[ Objective] Residue condition of thiacloprid in soil and rice was studied. [ Method] The residue decline of 480 g/L thiacloprid SC in rice soil and the final residue in rice was studied through crop field trials and ...[ Objective] Residue condition of thiacloprid in soil and rice was studied. [ Method] The residue decline of 480 g/L thiacloprid SC in rice soil and the final residue in rice was studied through crop field trials and liquid chromatography analysis. [ Result] Crop field trials in Jilin, Hunan and Guangdong during two years showed that the half-life of thiaclopdd in rice soil was 0.1 -0.5 d when application concentration was 315 g/hm^2. Under the dose condition with effective components of 315 and 210 g/hm^2, when insecticide was sprayed for 2 -3 times, the final residue in rice husk was lower than 7.830 mg/kg, the final residue in brown rice was less than 0.1 mg/kg. [ Conclusion] Take multiple factors into consideration, according to the recommended application dose of 210 g/hm^2, MRL value of thiacloprid in rice could be tentatively ascertained as 0.1 mg/kg, the preharvest interval was 7 d. aDolication frequencv was no more than two times.展开更多
[Objective] The aim was to research the residue decline and final residue of acetochlor in rice.[Method] By carrying out crop field trials in 3 places including Heilongjiang,Jilin and Hunan during two years and applyi...[Objective] The aim was to research the residue decline and final residue of acetochlor in rice.[Method] By carrying out crop field trials in 3 places including Heilongjiang,Jilin and Hunan during two years and applying GC technique,the residue decline of acetochlor in rice was analyzed and its final residue was determined.[Result] The half-life of acetochlor in rice was 4.4-8.3 d,being relatively short,and it belonged to easily degradable pesticide.Under dosage condition with effective components of 600 and 900 g/hm2,after application for one time,the determined acetochlor residues in rice were lower than 0.01 mg/kg.[Conclusion] Take multiple factors into consideration,according to the treatment with application dosage of 900 g/hm2,it was suggested that the MRL value of acetochlor in rice should be ascertained as 0.02 mg/kg temporarily and acetochlor should be applied for one time.展开更多
基金Supported by Pesticide Residue Project in Department of Agriculture(2008P080)~~
文摘[ Objective] Residue condition of thiacloprid in soil and rice was studied. [ Method] The residue decline of 480 g/L thiacloprid SC in rice soil and the final residue in rice was studied through crop field trials and liquid chromatography analysis. [ Result] Crop field trials in Jilin, Hunan and Guangdong during two years showed that the half-life of thiaclopdd in rice soil was 0.1 -0.5 d when application concentration was 315 g/hm^2. Under the dose condition with effective components of 315 and 210 g/hm^2, when insecticide was sprayed for 2 -3 times, the final residue in rice husk was lower than 7.830 mg/kg, the final residue in brown rice was less than 0.1 mg/kg. [ Conclusion] Take multiple factors into consideration, according to the recommended application dose of 210 g/hm^2, MRL value of thiacloprid in rice could be tentatively ascertained as 0.1 mg/kg, the preharvest interval was 7 d. aDolication frequencv was no more than two times.
基金Supported by Pesticide Residue Project in Department of Agriculture(2008F324)~~
文摘[Objective] The aim was to research the residue decline and final residue of acetochlor in rice.[Method] By carrying out crop field trials in 3 places including Heilongjiang,Jilin and Hunan during two years and applying GC technique,the residue decline of acetochlor in rice was analyzed and its final residue was determined.[Result] The half-life of acetochlor in rice was 4.4-8.3 d,being relatively short,and it belonged to easily degradable pesticide.Under dosage condition with effective components of 600 and 900 g/hm2,after application for one time,the determined acetochlor residues in rice were lower than 0.01 mg/kg.[Conclusion] Take multiple factors into consideration,according to the treatment with application dosage of 900 g/hm2,it was suggested that the MRL value of acetochlor in rice should be ascertained as 0.02 mg/kg temporarily and acetochlor should be applied for one time.
