数字农科院2.0

Uptake Of Soil-Applied Thiamethoxam In O.range And Its Effect A gainst Asian Citrus Psyllid In Different Seasons

文献类型： 外文期刊

作者： Su, Huanan;Zhang, Ning;Zhang, Zhixiang;Hu, Wei;Kuang, Fan;Lu, Zhanjun;Zhao, Qiyang;Li, Xingtao;Chun, Jiong;Zhong, Balian

作者机构：

关键词： Diaphorina citri; thiamethoxam; clothianidin; soil drench

期刊名称： PEST MANAGEMENT SCIENCE

ISSN： 1526-498X

年卷期： 2019 年 75 卷 5 期

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摘要： BACKGROUND Asian citrus psyllid (ACP), Diaphorina citri Kuwayama, is an important pest of citrus worldwide because it transmits the bacteria causing huanglongbing (HLB). We investigated the effects and persistence of two soil application rates of thiamethoxam on ACP populations in two flushing seasons in the field. Thiamethoxam and clothianidin residues in the fruit were detected to evaluate food safety. RESULTS Soil application of 50% thiamethoxam water-dispersible granules at concentrations of 4 and 10 g tree(-1) significantly decreased ACP populations, and there was a positive correlation between control efficacy and the persistence of thiamethoxam and clothianidin in leaves, providing longer-term protection for up to 90 days in the fall compared with 60 days in the spring. Higher thiamethoxam and clothianidin amounts were observed in new leaves than in old leaves. Thiamethoxam and clothianidin residues at a high rate in fruit were 0.012 and 0.010 mg kg(-1) at harvest, respectively, and neither insecticides was detectable at low rates. CONCLUSIONS These results demonstrate that soil-applied thiamethoxam plays a role in defending ACP, and provides an extended period of control efficacy. This knowledge could provide a reference for the control of ACP by soil application of thiamethoxam to reduce HLB spread. (c) 2018 Society of Chemical Industry

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