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棉龄虫是棉花蕾铃期的主要害虫,在黑龙港流域棉区一年发生4代,以2、3代为害棉花最重。做好2代棉铃虫的有效防治对控制危害、减少下代虫源,确保棉花优质高产具有重要意义。目前在生产中,防治二代棉铃虫仍存在着用药次数多。用药量大、杀伤天敌、污染环境等问题。为此,近几年来我们根据有关单位对棉花耐害补尝能力、二代棉铃虫对棉花危害损失及防治指标的研究,在黑龙港流域棉区示范推广了二代棉铃虫一次性防治技术,效果十分明显。现将防治效果、技术要点综述如下。一、一次性防治效果冀县植保站试验调查,二代棉铃虫百株累计卵247粒,卵盛孵期一次防治,8月20日单株成龄数(伏桃)15.4个、霜前花率89.7%。
Cotton Bollworm is the main insect in boll boll stage. Four generations occurred in the cotton area of Heilongjiang River Basin in one year, and the heaviest cotton was damaged by the second and third generations. Effective control of 2nd generation cotton bollworms is of great importance to control hazards, reduce the source of the next generation and ensure high quality and high yield of cotton. Currently in production, prevention and treatment of second generation bollworm there are still many times. Dosage, killing natural enemies, environmental pollution and other issues. To this end, in recent years, according to the relevant units on the ability to compensate for the damage of cotton, cotton bollworm on the second generation of harm to the loss of cotton and prevention and control indicators in the cotton area in Heilongjiang Valley to promote the second generation of cotton bollworm one-time control technology, The effect is very obvious. Now the control effect, the technical summary is as follows. First, a one-time control effect Plant protection station in Ji County, the pilot survey, the second generation of cotton bollworm 100 strains of cumulative eggs 247 eggs, egg Sheng a hatching period of control, August 20 single-adult population (Vase) 15.4, 89.7% rate.