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棉铃虫在棉田的发生和为害，一方面受棉田内自身生态条件影响，另一个不可忽视的方面，是与棉田外寄主植物间有着密切的联系。通过２ａ的多点调查认为：棉铃虫在不同区域、不同生态环境和寄主的不同生育期，对寄主的“亲和性”是不同的，同时不同寄主植物对棉铃虫的“适应性”也不同，由此可将棉铃虫寄主分为４个类型；另一方面，各寄主植物间虫源表现为相互转移和扩散，即寄主间有“库”与“源”的关系。
The occurrence and damage of cotton bollworm in the cotton field are affected by the ecological conditions in the cotton field on the one hand and the other can not be neglected in the cotton field. According to the multi-point survey of 2a, the “compatibility” of cotton bollworm is different to the host in different regions, different ecological environments and different growth stages of the host, and the adaptability of different host plants to cotton bollworm is also different , Which could divide the host of cotton bollworm into four types. On the other hand, the insects of each host plant showed mutual transfer and diffusion, that is, there was a relationship between the host and source.