友恩蚜小蜂成虫历期观察试验

Observation on Developmental Duration of Adult Encarsia amicula Viggiani et Ren

在松突圆蚧疫区,友恩蚜小蜂经过20多年的自然选择,已逐步适应松突圆蚧而成为优势种群,能持续稳定地控制松突圆蚧的严重危害.在室内黑暗和正常光照条件下进行友恩蚜小蜂成虫历期观察试验,以探索友恩蚜小蜂在离开野外生活环境成虫历期的变化及其存活情况.结果表明：友恩蚜小蜂在离开原生境,有营养补给,黑暗条件下可存活11～15天;而没有营养补给的其寿命只有2～3天.

After over twenty year＇s natural selection, Encarsia amicula Viggiani et Ren has adapted Hemiberlesia, pitysophila Takagi and become the dominant population progressively on the area infected by the later, thus it can prevent the damage of H. pitysophila Takagi continuously and stably. To seek after the developmental duration and livability of adult E. amicula Viggiani et Ren departed from field, indoor observation was, carried out respectively on dark and light condition. The results showed that on condition of departing from its original habitat, adult E. amicula Viggiani et Ren can survive eleven to fifteen days in dark with food, but survive only two or three days without food.