1·Further research has shown that caterpillars become virtually immune to the wilt virus as the trees on which they feed respond to increasing defoliation.
进一步的研究表明，毛虫对萎蔫病毒几乎具有免疫力，因为它们赖以为生的树木会对越来越多的落叶做出反应。
2·The defoliation of millions of acres of trees by massive infestations of gypsy moth caterpillars is a recurring phenomenon in the northeastern United States.
在美国东北部，舞毒蛾毛虫的大规模侵扰导致数百万英亩的树木落叶，这是一个反复出现的现象。
3·Elaine plucked a twig from the offending japonica and set about its systematic defoliation with savage concentration.
埃莱恩从难看的山茶上折了个嫩枝，开始猛烈的收集系统的落叶。
4·Decomposition of forest defoliation and role of soil animals in Xiao Hinggan Mountains.
小兴安岭森林落叶分解与土壤动物的作用。
5·When the attack is severe and allowed to continue, repeated defoliation will occur, resulting in a weakened plant.
当攻击是严重的，可以继续，将出现反复落叶，削弱的植物产生的。