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麦棉套种 对控制棉花苗期蚜虫十分有利。麦套棉由于小麦的屏障作用,不仅直接影响棉蚜迁入,而且棉田温度要比单作田低1℃,加上天敌的作用,苗期蚜虫不用施药防治即可控制。据山东省1988年4处试验点观察,全年不治虫单作棉田平均减产为31.3％,麦套棉田平均减产18.1％。 棉花绿豆间作 5～6月,单作田棉棵小,不利于天敌隐蔽;间作田绿豆发棵快,田间小气候有利于天敌
Wheat and cotton intercropping control of cotton seedling aphids is very favorable. Wheat wheat cotton barrier effect, not only directly affect the cotton aphid immigration, and the cotton field temperature is lower than the single field 1 ℃, coupled with the role of natural enemies, seedling aphids can be controlled without application of pesticides. According to the observation of 4 pilot stations in Shandong Province in 1988, the average annual reduction of non-pest insect-producing cotton fields was 31.3% and the average yield of wheat-cotton fields was 18.1%. Cotton mung bean intercropping 5 to 6 months, a single cotton field for the small, is not conducive to hidden natural enemies; intercropping fields mung bean quick, field microclimate is conducive to natural enemies