摘要
描述了寄生梨茎蜂JanuspiriOkamotoetMuramatsu的一种重要天敌新种———梨茎蜂啮小蜂Tetrastichusjanusisp.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。
The present paper describes a new species of Eulophidae （ Hymenoptera, Chalcidoidea）, Tetrastichus janusi sp. nov. It is gregariously ecto-parasitic on larva of pear shoot sawfly,Janus piri Okamoto 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.
出处
《动物分类学报》
CSCD
北大核心
2005年第3期613-617,共5页
Acta Zootaxonomica Sinica
关键词
膜翅目
姬小蜂科
啮小蜂属
新种
梨茎蜂
天敌
Hymenoptera, Cephidae, Tetrastichus, new species, new host record, China.
