【摘要】 应用内吸杀虫剂处理棉种是预防棉花苗期害虫为害的主要措施。防治棉蚜 Aphisgossypii Glover,用5%涕灭威颗粒剂每亩有效药量50克、75克、100克的持效期达57—60天以上;比3%呋喃丹颗粒剂(每亩有效药量45克、60克)长5—7天;比4%3911颗粒剂(每亩有效药量90克)长12—20天;比75%3911闷种(60克/亩)长29天以上。防治烟蓟马 Trips tabaci Lindman,5%涕灭威颗粒剂和4%3911颗粒剂(有效药量同前)的持效期达42—50天,比3%呋喃颗粒剂和75%3911闷种(有效药量同前)长10—20天以上。防治棉叶螨 Tetranychus urticae Koch,用5%涕灭威颗粒剂和4%3911颗粒剂的持效期达50天左右;比3%呋喃丹颗粒剂长10天。蕾期根际追施5%涕灭威颗粒剂(每亩有效药量50克、100克、150克),10天后杀虫效果分别达88.4%、90.77%和93.30%。更多还原

【Abstract】 The treatment of cotton seeds with sytesmic insecticidns is a major measure for the control of pests of cotton at the seedling stage.In the control of cotton aphids,5% Temik granules(with effective dosage of 50/75/100g/mu)may have a control effect lasting as long as 57-60 days.The duration is 5-7 days longer than that of 3% Furadan granules(effective dosage45-60g/mu),12-20 days longer than that of 4% Thimet granules(effective dosage 90g/mu), and is over 29 days longer than that of 75% Thimet seed treatment (effective dosage 60g/mu). In the control of cotton trips,5% Temik granules and 4% Thimet granules (same dosage)may have a control effect lasting as long as 42-50 days——a duration over 10-20 days longer than 3% Furadan granule and 75% thimet seed treatment. In the control of the two-spotted spider mite,5% Temik granules and 4% Thimet granules for seed treatment(same dosages)may have a control effect of about 50 days—a duration over 10 days longer than that of 3% Furadan granles(same dosages)An additional application of 5% Temik to theroot region(with effective dosages of 50,100,150 g/mu)may have a killing effect of 88.4%、90.77%、93.3% respectively after 10 days.更多还原