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蛀干害虫有以下发生特点:该类害虫仅_在树体外活动,其余虫态均在寄主的_或_内生活,其生境很少受外界气候变化的影响,_相对较少,种群数量也相对稳定。

时间：2021-09-08 15:37 关键词：青书学堂东北林业大学森林昆虫学

答案解析

标准答案：@#@成虫期@#@木质部@#@韧皮部@#@天敌种类,

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