The gypsy moth is also subject to attack by the nucleopolyhedrosis virus, or wilt disease, a particularly important killer of the caterpillars in outbreak years.
舞毒蛾还会受到核多角体病毒或萎蔫病的攻击,在毛虫爆发的年代,这是一种特别重要的杀手。
2
Tracking the spread of a disease is an important step in stopping its outbreak.
追踪疾病的传播是阻止其爆发的重要一步。
3
Nor were there any indications of a sudden diseaseoutbreak.