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麦棉套种田害虫为害对棉花生育及产量的影响比单作棉田大，因此单作棉田的防治指标在套种田无法应用。研究证明，适合套种田棉蚜棉铃虫的单独防治指标是苗蚜卷叶株率２０％，２代棉铃虫百株幼虫１２头；相继两次为害的复合指标为苗蚜卷叶株率５％，２代棉铃虫百株幼虫１２头；相继３次为害的复合指标为苗蚜卷叶株率５％，棉铃虫百株幼虫２代为８头，３代为６头；相继４次为害的复合指标为苗蚜卷叶株率５％，伏蚜百株三叶蚜量１万头，棉铃虫２代、３代百株幼虫均为６头。
The effect of pest damage on the growth and yield of cotton was more than that of monoculture cotton fields. Therefore, the index of prevention and control in cotton field could not be applied in the field. Studies have shown that cotton bollworm suitable for a single set of cotton bollworm control index is 20% of the volume of seedling aphid convulsions, 12 generations of cotton bollworm larvae 12; the composite index of two consecutive damage to the seedling aphid coil rate of 5% , Two generations of cotton bollworm one hundred larvae 12; three times the composite index of the damage is the seedling aphid coil rate of 5%, one hundred cotton bollworm 2 generations of 8, 3 generations of 6; 4 times the composite indicators of damage For the seedling aphid coil rate of 5%, aphid aphid hundred trilobates amount of 10,000, two generations of cotton bollworm, three generations of 100 larvae are 6.