苜蓿叶象啮小蜂生物学特性的初步研究  

Preliminary Study on Biological Characters of Tetrastichus incertus (Ratzeburg),a Parasite of the Alfalfa Weevi

作　　者：朱晓锋[1] 赵莉[1] 美丽开[1] 

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

出　　处：《新疆农业大学学报》2006年第1期19-23,共5页Journal of Xinjiang Agricultural University

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办资助

摘　　要：苜蓿叶象啮小蜂Tetrastichus incertus（Ratzeburg）是苜蓿叶象甲Hypera postica（Gyllenhal）幼虫的一种内寄生性天敌。对苜蓿叶象啮小蜂的形态特征、发育、羽化、交配、产卵的行为学特性及其越冬做丁初步研究。结果表明：苜蓿叶象啮小蜂处于3龄时，其被寄生寄主已死亡；田间单个被寄生寄主羽化出蜂范围为1～14头，平均为7．43头；成蜂羽化高峰期为8：00～12：00，其羽化量约占83．33％；苜蓿叶象啮小蜂以老熟幼虫在寄主体内越冬；初春，实验室、田间已越冬的苜蓿叶象啮小蜂的羽化率分别为83．9％，40．4％。Tetrastichus incertus （Ratzeburg） is a endoparasite of larvae of the alfalfa weevil, Hypera postica （Oyllenhal）. The preliminarily study was made on the characters of morphology, development,e closion,mating,oviposition and overwintering of T. incertus . The results demostrated that when the larvae of T. incertus were the 3rd instar, their hosts parasitized had already died, adult emergence was ranged from 1 to 14 host, average was 7.43 ,eclosion percentage was about 83.33%; peak hour of adult eclosion was 8-12 o＇clock, in addition to T. incertus overwinters as mature larvae within host. In early spring the emergence rates of adult overwintered in laboratory and in field were 83.9% and 40.4% respectively.

关 键 词：苜蓿叶象啮小蜂 形态特征 行为学特性 越冬 发育 

分 类 号：S435.4[农业科学—农业昆虫与害虫防治]