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肖县黄口棉区害虫主要天敌优势种是瓢虫、草蛉、蜘蛛3大类。近两年防治棉花害虫的主要农药品种多是有机磷类、菊酯类及有机氯杀螨剂,对天敌的杀伤很大。1984年我们把几种农药对棉虫天敌的杀伤作用进行了试验。 一、试验方法 1984年6月27日—7月6日在黄口乡杨各村进行。分8个处理,2次重复,每小区面积0.1亩,小区顺序排列。药液用量均为120斤/亩,8个处理是:
The main predators of pests in Huangkou cotton area of Xiao County are three kinds of ladybugs, herbivores and spiders. In the past two years, most of the major pesticides for controlling cotton pests are organophosphates, pyrethroids and organochlorine acaricides, killing a large number of natural enemies. In 1984, we tested the killing effect of several pesticides on the natural enemies of cotton insects. First, the test method June 27, 1984 -6 July Yang Village in Huangkou Township. Divided into eight treatment, two repetitions, each plot area of 0.1 acres, the district arranged in order. Liquid dosage is 120 pounds / mu, 8 treatments are: