Larvae survived and grew very well on foliage of Catharanthus roseus L.;but all larvae died when fed foliage of Allamanda cathartica L.;

• 化学分析也发现植物化学物质的含量在这三种植物之间相差很显著，尤其是含氮量，在三种树叶上的含量都不一样。