地膜覆盖棉田系统生态因素对蚜虫的综合治理技术研究

1986～1988年,通过不同年型、不同生态环境试验,地膜覆盖棉田苗期蚜虫的防治,可不采用杀虫剂拌种;地膜白色反射光可以拒避有翅蚜入田,推迟发生期;蚜虫初发时,利用无视异绒螨抑制棉蚜种群增长;盛发期,依靠麦田七星瓢虫等天敌的自然迁移控制蚜虫.如虫口达到防治指标,可采用氧化乐果涂茎防治.

The Technical Research of Comprehensive Control on the Cotton Aphids with Systematic Ecological Factors in Film-mulched Cotton Fields

During 1980-1988, experiments were carried out in different years and ccotypes. The results showed that the insecticides may not be used as dressing in film-mulched cotton fields to control cotton aphid at the seedling stage. The white reflected light of the film can prevent alate aphids from flying in the fields, and delay the occurancc period. At the aphid incipience Allilhrombium ignolum gave full play to inhibit its increase of papulation At the peak period of aphid population, it is controlled relying on the natural migration of aphidis natural enemies such as Sevenspot Lady Beeltles (Coccinella seplempunctata L). Once the past population reached the threshold of control, cotton stems may be paluted with the Omethoate for control.