Their report, in the September Ecology Letters, also notes that leaf chemistry analyses and tests with color-sensitive herbivores are needed to uncover the mechanisms that reduce insect damage.

• 该篇刊登于2003年9月号《生态学学报》的文章又指出，想要找出降低虫害的机制，将必须针对树叶做化学分析，还要拿对颜色敏感的草食动物做试验。