非稻田生境与稻飞虱卵期主要寄生蜂的关系

Effects of non-rice habitats on the egg parasitoids of rice planthoppers.

研究表明，稻飞虱的重要寄生性天敌缨小蜂Ａｎａｇｒｕｓｆｌａｖｅｏｌｕｓ、Ａ．ｏｐｔａｂｉｌｉｓ和寡索赤眼蜂Ｏｌｉｇｏｓｉｔａｎａｉａｓ及Ｏ．ａｅｓｏｐｉ同时存在于稻田及其周围的非稻田生境中。寄主卵、寄主植物和栖息生境对卵寄生蜂的性比、体形大小和发育历期有着明显的影响。非稻田生境中禾本科杂草的种类和数量首先影响飞虱和叶蝉，从而影响卵寄生蜂的种群数量和质量。植物花对卵寄生蜂成虫的生存和寄生行为非常重要。

This paper revealed that egg parasitoid of rice planthoppers,Anagrus flaveolus, A.optabilis,Oligosita naias and O.aesopi existed in both rice fields and neighboring non-rice habitats.Host eggs、host plants of egg parasitoids and habitats obviously affected the population dynamics,sexual ratio,body size and growth rate of egg parasitoids.The gramineous plants surrounding rice fields have significant effects on non-rice homopterans and their egg parasitoids.Plant flower(con-taining nectar and pollen)in non-rice habitats would supply necessary nutrients for the survival and parasitize of egg parasitoids.