东北地区蜂群室内越冬，蜂巢微生态环境表现出明显的特性。
It expresses obvious character from the entironment in honeybee colony which living through the winter indoors in northeast region.
比较研究了当年采自田间的褐飞虱种群与上一年虫源在室内越冬繁殖种群对不同抗虫品种的致害性差异。
The virulence characteristics of brown planthopper, Nilaparvata lugens Stal, from paddy field population and greenhouse population collected in late rice field last year was compared.
大叶黄杨尺蠖在上海一年发生三代，但在室内饲育可完成四代，以蛹在土中越冬。
Investigations in Shanghai reveal that three generation of euonymus geometer occur inthe course of a year, with the pupa surviving the winter underground.
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