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塑膜覆盖栽培技术在棉田的应用,使棉蚜(侨居蚜)赖以生存的小生境发生改变,因而其田间消长也出现了新的特点。明确棉蚜在新的条件下的消长特点,对制定相应的防治策略和措施具有重要的生产指导意义。据刘绍友、仵光俊等观察,地膜棉田苗蚜比露地显著下降,认为其原因主要是塑膜对有翅蚜迁飞有一定驱避作用,迁人有翅蚜量比露地减少65.65—77.1％,因而使田间蚜量比露地下降62.64—93.53％甚至100％;又认为地膜棉地温高生长快,抗蚜力强,因而卷叶株率下降90.48％。而李曼瑞等观察,覆盖棉蚜发生量比露地高0.5—3.2倍。作者1981—1984年观察和试验
The application of plastic film mulching cultivation in cotton fields changed the niche in which cotton aphid (Aphis gossypii) survived, so new characteristics emerged in the field. Clear cotton aphid in the new conditions of growth and decline of the characteristics of the development of appropriate control strategies and measures has an important guiding significance for the production. According to Liu Shaoyou, Zhuang Guangjun and other observations, mulberry cotton seedling aphids significantly lower than the open field, that the main reason is the plastic film on the winged aphids flying there is a certain role in the removal of a winged aphids moved less than the open 65.65-77.1% Therefore, the amount of aphids in the field decreased by 62.64-93.53% or even 100% compared with that in the open field. It was also considered that the temperature of the mulching cotton growed fast and the resistance to aphids was strong, thus the rate of rolling the leaf decreased by 90.48%. The observation of Li Manrui, covering cotton aphid occurs 0.5-3.2 times higher than the open field. Author 1981-1984 observation and experiment