1. larvae of a gregarious North American moth that spins a carpet rather than a tent; serious defoliator of deciduous trees. 
   北美洲群居蛾子的幼虫，吐丝建毯子而不是帐篷；落叶植物的严重食叶昆虫。
2. The key pests and rat include: nematodiasis of the pines and pine moth, forest rats, defoliator of the poplars, bristletail. 
   二是松毛虫、森林鼠害、杨树食叶害虫等常发性病虫害；三是小蠹虫、萧氏松茎象等钻蛀性害虫。

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