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棉铃虫的防治,重点应摆在“多种措施抓三前,四查两定治三峰,自然天敌利用好,土、化农药把关键,控前(指八月前)治后(八月中旬后)争立功,敢打敢停保丰收”的策略。我场在这一策略的指导下,逐步认识了棉铃虫危害,摸索了一些防治途径,大大降低了农药费用(每亩由12元减少到1.65元),主要是抓好了以下几个方面的工作。 1、消灭虫源,压低虫口基数①消灭越冬前的幼虫。主要是消灭虫源杂草,使幼虫无法进入化蛹阶段,完成不了生活周期。本场主要的虫源杂草有苍耳、野
Prevention and treatment of cotton bollworm should focus on “a variety of measures to grasp the three before, four check the two rule three peaks, natural enemies to make good use of soil, chemical pesticides to the key, before the control (referring to August) after the rule After) fight meritorious service, dare to dare to stop bumper harvest ”strategy. Under the guidance of this strategy, I gradually realized the harm of bollworm and explored some prevention and control measures, greatly reducing the cost of pesticides (from 12 yuan per mu to 1.65 yuan per mu), mainly focusing on the following aspects jobs. 1, eliminate the source of insects, insect population base ① eliminate the pre-winter larvae. Mainly to eliminate weeds insects, larvae can not enter the pupation stage, can not complete the life cycle. The main insect weeds have cocklebur, wild