论文部分内容阅读
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%。
Application of insecticides to treat cottonseed is to prevent cotton seedling pests damage the main measures. Aphis gossypii Glover, aphis gossypii Glover, with 5% aldicarb granules per acre effective dose of 50 grams, 75 grams, 100 grams of the holding period of 57-60 days more than 3% carbofuran granules (effective drug per acre (45 g, 60 g) for 5-7 days longer than 12% for 4% 3911 granules (90 g effective dose per acre); longer than 29 days longer than 75% . Control Thrips tabaci Lindman, 5% aldicarb granules and 4% 3911 granules (effective dose with the former) of the holding period of 42-50 days, than 3% of furan granules and 75% (Effective dose with the former) longer than 10-20 days. Control Tetranychus urticae Koch Tetranychus urticae Koch, with 5% aldicarb granules and 4% 3911 granules for about 50 days; than 3% carbofuran granules for 10 days. The 5% aldicarb granules (50g, 100g, 150g / acre) were applied to the rhizosphere of budding stage. The insecticidal effect reached 88.4%, 90.77% and 93.30% respectively after 10 days.