【摘要】 本文运用灰色系统理论,分析研究了棉田插种油菜,油菜的蚜虫招引繁殖七星瓢虫,用瓢虫控制棉蚜以保护棉花免受蚜害的灰色系统控制问题。得到了用其它理论难以得到的动态情况下的有效瓢蚜比ψ≈1:120的定量关系,并为改善系统的外控制提供了依据。更多还原

【Abstract】 A systems control of insect pests is studied with the grey system theory. By interplanting rapeseeds in the cotton field, a mass breeding of ladybugs (Coccinella Seprempunctata) induced by rapeseed aphids eventually wipes out the cotton aphidssA quantitative relation which is difficult to deduce from other theories is obtained here in dynamic state and expressed as an effective ratio of ladybug to cotton aphid at =1:120. This provides a basis for the improvement of the systems control.更多还原