苜蓿叶象啮小蜂寿命及产卵量的研究  

Study on the longevity and fecundity of Tetrastichus incertus (Ratzeburg),a parasite of the alfalfa weevil Hypera postica(Gyllenhal)

作　　者：朱晓锋[1] 赵莉[1] 刘倩[1] 

机构地区：[1]新疆农业大学农学院,新疆草地资源与生态重点实验室,乌鲁木齐830052

出　　处：《环境昆虫学报》2008年第1期83-85,共3页Journal of Environmental Entomology

基　　金：新疆维吾尔自治区科技攻关和重点项目(200231107);新疆现代化畜牧业试验示范项目

摘　　要：在室内通过对苜蓿叶象啮小蜂Tetrastichus incertus（Ratzeburg）寿命、产卵量的研究发现,苜蓿叶象啮小蜂有较高的产卵量和寄生能力;在不喂食的条件下,苜蓿叶象啮小蜂产卵量最高,单头雌蜂的产卵范围为45粒-209粒,平均117粒,最高日产卵量为31粒;其寿命可达18d,最多可寄生37头寄主;苜蓿叶象啮小蜂与寄主在1：5的情况下寄生率达56.00%,并随着寄主密度的增大,苜蓿叶象啮小蜂的产卵量也有逐渐升高的趋势。Laboratory data indicated Tetrastichus incertus （Ratzeburg） has great fecundity and aggres- siveness. Under the condition of no food , the total lifetime fecundity of female ranged from 45 eggs to 209 eggs, average fecundity is 117 eggs and the most daily fecundity reach 31 eggs. To a female, it can parasitize 37 hosts. The longest longevity of female is 18 d. One T. incertus to five alfalfa weevil, Hypera postica would be necessary to achieve 56% parasitism of host. And the number of fecundity of female increased with increase of larval density.

关 键 词：苜蓿叶象啮小蜂 寿命 产卵量 寄生 

分 类 号：S476[农业科学—农业昆虫与害虫防治]