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Dissipation and Residues of Difenoconazole and Azoxystrobin in Bananas and Soil in Two Agro-Climatic Zones of China

文献类型： 外文期刊

作者： Huan, Zhibo 1 ; Xu, Zhi 1 ; Lv, Daizhu 1 ; Xie, Defang 1 ; Luo, Jinhui 1 ;

作者机构： 1.Chinese Acad Trop Agr Sci, Anal & Testing Ctr, Haikou 571101, Peoples R China

关键词： Dissipation;Residues;Difenoconazole;Azoxystrobin

期刊名称：BULLETIN OF ENVIRONMENTAL CONTAMINATION AND TOXICOLOGY （ 影响因子：2.151； 五年影响因子：2.129 ）

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收录情况： SCI

摘要： Residues of a fungicide suspension (12iu % difenoconazole, 18iu % azoxystrobin) in bananas and soil were studied under tropical and subtropical monsoon climates, in Hainan and Yunnan provinces, respectively. The half-lives in bananas were shorter in Hainan (difenoconazole: 8.410.7iu days; azoxystrobin: 7.88.4iu days) than Yunnan (difenoconazole: 11.313.0iu days; azoxystrobin: 10.411.6iu days), possibly because of the higher temperatures and solar radiation levels in Hainan. The half-lives in soil were shorter in Yunnan (difenoconazole: 15.516.7; azoxystrobin: 11.913.9iu days) than Hainan (difenoconazole: 23.123.2iu days; azoxystrobin: 16.016.1iu days), possibly because the organic carbon content was higher and rainfall lower in Yunnan than Hainan. Their physico-chemical properties suggest difenoconazole and azoxystrobin should be stable in bananas and soil, but both decreased to safe concentrations by the minimum harvest time after spraying the mixture at the recommended dosage and 1.5 times that dosage, through physical, chemical, and biological processes.

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