为了掌握棉田益、害虫自然种群的动态及药剂对天敌杀伤情况,有效地防治棉田害虫,提高生产的经济效益,1983年特进行本项试验。 方 法 一、棉田害虫天敌自然种群动态调查 将肥力中等的供试棉田一亩,划分成面积相等的40个小区,1983年4月16日用棉种(供试品种为鲁棉一号)量1％的3911拌种,17日播种,出 In order to master the benefits of cotton fields, natural populations of pests dynamics and pesticides killing natural enemies, effective control of pests in cotton fields and improve the economic benefits of production, especially in 1983 this test. Method One, natural population dynamics of pest natural enemies in cotton field The fertility of the test for a mu of cotton, divided into 40 equal areas of the area, April 16, 1983 with cotton (test varieties for the luma 1) 1 % 3911 seed dressing, sown on the 17th