In stands dominated by trees such as aspen, however, incipient gypsymoth outbreaks are quickly suppressed by viral epidemics.
然而,在以白杨等树为主的林分,最初的舞毒蛾爆发很快就被病毒流行病所抑制。
2
The defoliation of millions of acres of trees by massive infestations of gypsymoth 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
The gypsymoth is also subject to attack by the nucleopolyhedrosis virus, or wilt disease, a particularly important killer of the caterpillars in outbreak years.