Often cited examples of sympatric speciation are found in insects which become dependent on different host plants in the same area.
经常提到的同域物种形成实例，是在同一地区的、依赖于不同寄主植物的昆虫中发现的。
As to different host plants, HJS strain preferred to oviposit in the host eggs on pepper, but tobacco budworm preferred to oviposit on tobacco.
HJS对辣椒上烟青虫卵的寄生选择系数较高，而烟青虫偏好产卵于烟草。
In addition, the quantitative dynamics of population and the densities difference of S. exigua on different host plants in the field were found out.
查明了南宁市郊区甜菜夜蛾周年种群数量动态规律及不同寄主上的虫口密度差异；
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