黄金小蜂生物学特性的初步研究

作者对菜粉蝶蛹期主要寄生蜂——黄金小蜂若干生物学特性进行了初步研究,并提出尚未解决的问题。该蜂在信阳一年发生13代(室内),以幼虫在菜粉蝶蛹内越冬。一头寄主中最多可出蜂173头,最高平均雌蜂率为91.1％。常见1—2个羽化孔位于寄主翅芽处。每头成蜂均可多次与不同异性交尾。每雌可在两个以上寄主上多次产卵。雌蜂寿命长于雄蜂。有趋光性。飞行力弱。对该蜂世代重叠、孤雌生殖及自然环境中的年生活史尚需进一步探计。

Preliminary Study on Biological Characteristics of Pteromalus Puparum

The author has made a preliminary research on some of the biological characteristics of the Pteromalus puparum, the main parasitic wasp during the pupal period of pieris rapae and put forth some problems unsolved. This kind of wasp, whose larvae spend the cold winter season inside the pupae of pieris rapae, can multiply ]3 generations of offsprings ( indoors ) in Xinyang District each year. Out of one larva of the pieris rapae, 149 pteromalus puparum can be parasitized to the utmost and the highest average rate of the female wasp is 91.1% .Commonly one or two edosion holes lie closely under the wings of the pieris rapae. Each mature pteromalus puparum can mate with different males ones many times and each female one can lay eggs many times on more than two pieris rapae. The life span of a female Pteromalus puparum is longer than that of a male one. This kind of wasp is of phototaxis and weak in flying. Further research is still needed to this wasp including its overlap of generations, its unifemale reproduction and its living circle of a year upder natural surroundings.