非农田生境飞虱卵寄生蜂群落的结构和动态

褐飞虱Ｎｉｌａｐａｒｖａｔａｌｕｇｅｎｓ Ｓｔｌ 是水稻的主要害虫之一． 在我国， 其间歇性大发生的局面仍没有改观． 以保护利用自然天敌为主的控制策略正日益受到重视． 在田埂和路边２ 个亚种库中， 共收集到能寄生褐飞虱卵的寄生蜂２０ 种， 分别属于缨小蜂科和赤眼蜂科． 其种类和数量在１ 月份有所下降， 在３ 月底和４ 月初开始上升． 水稻移植后稍有下降． 早稻收割后和晚稻生长后期， 又明显增加． 两个亚种库的群落优势种类也基本相同， 通常为稻虱缨小蜂和拟稻虱缨小蜂， 但优势度指数不同． 飞虱卵寄生蜂的种库对稻田寄生蜂群落的重建、结构及功能均有显著影响

Structure and Dynamics of Egg Parasition Community of Planthopper in Non Rice Habitats

Brown planthopper (BPH) Nilaparvata lugens Stl is the most important insect pest of rice worldwide The situation of its intermittent outbreaks has not changed In the integrated management of this pest, a strategy of protecting and utilizing natural enemies is received more and more attention Twenty parasitoids that could parasitize BPH eggs were collected on the bunds and roadside vegetation near to the rice field, which belong to 2 families, Mymaridae and Trichogrammatidae The kinds and densities of the parasitoids decreased in January and increased in late March or early April After rice being transplanted, they decreased again After rice being harvested, they went up obviously The dominant species were almost the same in the 2 species sub species pools They usually were Anagrus nilaparvatae Pang et Wang and A paranilaparvatae Pang et Wang The species pool plays an important role in the reestablishment process of egg parasitoid community and its structure and function in rice fields.