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[目的]为明确20%呋虫胺SG对棉盲蝽象的防治效果,开展了该药的田间药效试验。[结果]20%呋虫胺SG 450、300、225、150 g a.i./hm2和50%马拉硫磷EC 750 mL a.i./hm2对棉盲蝽象的防效,药后1 d依次为100%、80%、81.82%、75%和50%,药后3 d的防效依次为100%、100%、94.29%、80.25%和46.45%;药后7 d的防效依次为100%、95.15%、95%、80.11%和41.86%。[结论]20%呋虫胺SG防治棉盲蝽象具有速效、持效且对棉花安全的特点,是防治棉盲蝽象理想药剂。在中等偏轻发生年份用量为150~225 g a.i./hm2,在中等以上发生程度年份用量为225~300 g a.i./hm2。
[Objective] The purpose of this study was to determine the control effect of 20% dinotefuran SG on the cotton planthopper. [Result] The control effects of 20% dinotefuran SG 450,300,225,150 g ai / hm2 and 50% malathion EC 750 mL ai / hm2 on cotton planthoppers were 100% , 80%, 81.82%, 75% and 50% respectively. The control effects on the 3rd day after drug treatment were 100%, 100%, 94.29%, 80.25% and 46.45% %, 95%, 80.11% and 41.86%. [Conclusion] The control effect of 20% dinotefuran SG against cotton planthopper was quick, efficient and safe to cotton, which was an ideal agent for controlling cotton planthopper. In the moderate amount of light in the annual amount of 150 ~ 225 g a.i./hm2, in the middle of the degree of occurrence of the annual amount of 225 ~ 300 g a.i./hm2.