论文部分内容阅读
研究和实践证明,把某些作物通过合理间作、套作或混作等形式,巧妙搭配种植,往往可以控制或减轻某些病虫害的发生。举例如下。麦棉套作这种配植方法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,而且套作棉田温度要比单作田低1℃左右,再加上麦田天敌的作用,不用施药防治即可控制棉蚜为害。据1988年山东省4处试验点
Research and practice have proved that it is often possible to control or mitigate the occurrence of some pests by cleverly planting some crops in the form of reasonable intercropping, intercropping or mixing. Here’s an example. Wheat cotton cover for this method of planting cotton aphids control of seedling is very favorable. Wheat wheat cotton barrier effect, not only directly affect the cotton aphid immigration, and intercropping cotton field temperature is lower than the single field about 1 ℃, coupled with the role of wheat natural enemies, without spraying control can control cotton aphid damage. According to 1988, Shandong Province, four test points