环斑猛猎蝽生物学特性的研究*

据北京室内饲养观察，环斑猛猎蝽一年发生一代，以４龄若虫越冬。卵期９．９±１．１ｄ。若虫共５龄，历期３１５．０±４．９ｄ。成虫羽化后７－２５ｄ交配，交配后２２－２３ｄ开始产卵。描述了各虫态形态特征。记述了生物学特性。试验表明该虫是杨扇舟蛾、黄刺蛾、杨叶蜂、舞毒蛾、油松毛虫、黄褐天幕毛虫、刺槐蚜等多种林木害虫的捕食性天敌。

A Study on the Bionomics of Predatory Bug (Sphedanolestes impressicollis)

Laboratory rearing and simulated field overwintering of Sphedanolestes impressicollis Stal were conducted in Beijing in 1991-1992. It has one generation a year and overwinters in 4 th instar in nymphal stage. The eggs aggregate in the form of egg masses, and hatch in 9.9+1.1 days after oviposition. There are 5 instars in nymphal stage and its development lasts for 315.0±4.9 days. The adults mate in 7~25 days after emergence and oviposit 22~23 days later. Not only its morphology and changes in color after moulting in all stages but also the bionomics were described. Experiments both in laboratory and in the field showed that it is a promising predator and can prey on Clostera anachoreta (Fabricius), Cnidocampa flavesccns (Walker), Nematus sp., Lymantria dispar (L.), Dendrblimus tabulaeformis Tsai et Liu, Malacosoma neustriatestacea Motschulsky,Aphis robi-niae Macchiati etc. many species of forest pests.