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| Residues and Persistence of Novel Insecticide HNPC-A3061 in Chinese Cabbages and Soils |
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| KeyWord:brochlorfenapyr（HNPC-A3061）; Chinese cabbages; soils; dissipation dynamics; residues |
| Author Name | Affiliation | | YANG Cheng-hu | College of Environmental Science and Engineering, Hunan University, Changsha 410082, China
2.Key Laboratory of Environmental Biology and Pollution Control（Hunan University）, Ministry of Education, Changsha 410082, China
3.National Engineering Center for Agrochemicals, Hunan Research Institute of Chemical Industry, Changsha 410007, China | | OU Xiao-ming | College of Environmental Science and Engineering, Hunan University, Changsha 410082, China
National Engineering Center for Agrochemicals, Hunan Research Institute of Chemical Industry, Changsha 410007, China
Hunan Province Key Laboratory for Agrochemicals, Changsha 410007, China | | LIU Hong-yu | College of Environmental Science and Engineering, Hunan University, Changsha 410082, China
Key Laboratory of Environmental Biology and Pollution Control（Hunan University）, Ministry of Education, Changsha 410082, China | | LIANG Ji | National Engineering Center for Agrochemicals, Hunan Research Institute of Chemical Industry, Changsha 410007, China
Hunan Province Key Laboratory for Agrochemicals, Changsha 410007, China | | FU Qi-ming | National Engineering Center for Agrochemicals, Hunan Research Institute of Chemical Industry, Changsha 410007, China
Hunan Province Key Laboratory for Agrochemicals, Changsha 410007, China | | REN Jing | National Engineering Center for Agrochemicals, Hunan Research Institute of Chemical Industry, Changsha 410007, China
Hunan Province Key Laboratory for Agrochemicals, Changsha 410007, China | | NIE Si-qiao | National Engineering Center for Agrochemicals, Hunan Research Institute of Chemical Industry, Changsha 410007, China
Hunan Province Key Laboratory for Agrochemicals, Changsha 410007, China |
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| Abstract: |
| Brochlorfenapyr, test code：HNPC-A3061; chemical name：1-（2-chloroethoxy）methyl-4-brom -2-（4-chlorophenyl）-5-tirfluoromethylpyrrol-3-nitrile）, is a novel pyrrole insecticide discovered by Hunan Research Institute of Chemical Industry, and is used to control pest insects on crops such as vegetables, rice and cotton. Field experiments were conducted to study the residues and dissipation dynamics of HNPC-A3061 in Chinese cabbages, and soils in Hunan, Hebei and Jiangsu for two years. The initial deposition of HNPC-A3061 on Chinese cabbages was 2.686 mg·kg-1, 1.715 mg·kg-1 and 2.603 mg·kg-1 in 2012, and 4.859 mg·kg-1, 2.665 mg·kg-1 and 1.755 mg·kg-1 in 2013 for Hunan, Hebei and Jiangsu, respectively. The half life of HNPC-A3061 on Chinese cabbages was 5.28 d, 5.14 d and 6.16 d in 2012, and 7.17 d, 6.42 d and 10.73 d in 2013 for Hunan, Hebei and Jiangsu, respectively. The initial amounts of HNPC-A3061 deposited on soils were 1.284 mg·kg-1, 0.451 mg·kg-1 and 0.298 mg·kg-1 in 2012, and 0.705 mg·kg-1, 0.691 mg·kg-1 and 0.648 mg·kg-1 in 2013 for Hunan, Hebei and Jiangsu, respectively. In soils, HNPC-A3061 had a half life of 13.05 d, 7.87 d and 11.12 d in 2012, and 2.75 d, 2.32 d and 5.94 d in 2013 for Hunan, Hebei and Jiangsu, respectively. Based on the classification of pesticide residues of China, HNPC-A3061 was a low toxic and non-persistent pesticide. When spaying 3~4 times with the recommended dosages of 18 g a.i.·hm-2 and 27 g a.i.·hm-2，the final maximum residue levels（MRL）of HNPC-A3061 in Chinese cabbages and soils were 0.290 mg·kg-1 and 0.141 mg·kg-1 at 14 d after the last application, respectively. These values were lower than the standard of 1.0 mg·kg-1 with pre-harvest interval of 14 d established by US EPA for the same class insecticide chlorfenapyr in Chinese cabbages. |
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