新疆棉田吡虫啉残留动态及其防治棉蚜田间用药量确定

时英爽, 高有华, 蔡超, 高晨阳, 韩冯阳, 景伟文

中国棉花 ›› 2019, Vol. 46 ›› Issue (10) : 25-29. DOI: 10.11963/1000-632X.sysjww.20191107
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新疆棉田吡虫啉残留动态及其防治棉蚜田间用药量确定

  • 时英爽1,高有华2,蔡超2,高晨阳1,韩冯阳1,景伟文1*
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Imidacloprid Residue Dynamics in the Cotton Field of Xinjiang and Determination of Its Dosage for Controlling Cotton Aphid

  • Shi Yingshuang, Gao Youhua, Cai Chao, Gao Chenyang, Han Fengyang, Jing Weiwen*
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摘要

为探讨吡虫啉在新疆地区环境和农业条件下合理、科学的应用方法,测定了70%(质量分数)吡虫啉水分散粒剂在棉花叶片和土壤中的残留和消解动态,并进行了其对田间棉蚜的防治试验。结果表明:根据所建立的分析方法的测定结果,在用药量(有效成分,下同)10.50~47.25 g·hm-2范围内,吡虫啉的靶向原始沉积量为0.53~1.99 mg·kg-1,施药后的第7天,吡虫啉的残留量为0.18~0.53 mg·kg-1,消解率在65.9%~75.7%。棉花叶片中吡虫啉的消解动态符合一级动力学方程,消解半衰期为3.17~3.85 d。防效的调查结果显示,高剂量处理对棉蚜虫的校正防效显著高于低剂量;施药后3 d,药剂各处理的校正防效均达到最大;药后7 d,21.0~47.25 g·hm-2剂量处理的校正防效仍超过85%。叶片中吡虫啉的残留量(x)与防效(y)存在正相关关系,线性方程为y =8.07x + 54.11,R2=0.886 8。建议在本地区应用70%吡虫啉水分散粒剂防治棉蚜的安全有效用药量为21.0~31.5 g·hm-2

关键词

吡虫啉 / 棉蚜 / 残留 / 棉花叶片 / 田间药效

引用本文

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时英爽, 高有华, 蔡超, 高晨阳, 韩冯阳, 景伟文. 新疆棉田吡虫啉残留动态及其防治棉蚜田间用药量确定[J]. 中国棉花, 2019, 46(10): 25-29. https://doi.org/10.11963/1000-632X.sysjww.20191107
Shi Yingshuang, Gao Youhua, Cai Chao, Gao Chenyang, Han Fengyang, Jing Weiwen. Imidacloprid Residue Dynamics in the Cotton Field of Xinjiang and Determination of Its Dosage for Controlling Cotton Aphid[J]. China Cotton, 2019, 46(10): 25-29. https://doi.org/10.11963/1000-632X.sysjww.20191107

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基金

国家重点研发计划 (2016YFD0200207-3);大学生创新基金

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病虫草害防治

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