To evaluate the effects of foliage quality on insect feeding performance, leaf tissues from all plant species were collected and assayed for water and nitrogen contents.

• 结果显示夹竹桃天蛾在这三种夹竹桃科植物上的取食表现显著的不一样，食用软枝黄蝉树叶的幼虫全部死亡；