描述了寄生梨茎蜂Janus piri Okamoto et Muramatsu的一种重要天敌新种--梨茎蜂啮小蜂Tetrastichus janusi sp.nov.,该种属小蜂总科姬小蜂科啮小蜂属.新种群集外寄生于梨茎蜂幼虫,一般1头寄主上寄生4～14头个体,雌雄性比为2.6∶1.0.一年发生两代.在越冬代梨茎蜂幼虫中的寄生率达44.7%.新种在梨茎蜂的生物防治中具有良好的应用前景.这是啮小蜂亚科在国内外首次发现寄生于茎蜂科害虫.新种模式标本保存于中国林业科学研究院昆虫标本馆.
A NEW SPECIES OF THE GENUS TETRASTICHUS (HYMENOPTERA, EULOPHIDAE)PARASITIZING PEAR SHOOT GIRDLER, JANUS PIRI (HYMENOPTERA, CEPHIDAE)
The present paper describes a new species of Eulophidae ( Hymenoptera, Chalcidoidea), Te-trastichus janusi sp. nov. It is gregariously ecto-para-sitic on larva of pear shoot sawfly, Janus piri Okamo-to and Muramatsu, a serious pest in pear orchards in most parts of China. The ratio of female and male is 2.6 : 1.0 and usaully 4-14 individuals were found to parasitize one host. The species have two generations a year. Its parasitic ratio was 44.7% in the overwintered host larva. It is the first record that the cephid pest is a host of the subfamily Tetrastichinae (Eulophidae) . The new species may have a potential as a biological control agent for the important pest. The type specimens were deposited in the Insect Museum of Chinese Academy of Forestry, Beijing.
NETL
NSTL
万方数据
