【摘要】 <正> 一、甘蔗田赤眼蜂的自然种群及其优势种调查广东省研究利用赤眼蜂防治甘蔗螟虫,始于五十年代。在生产上应用已有多年历史。近十多年来,由于国内、外赤眼蜂种类调查和分类研究的发展,国内对玉米田和稻田赤眼蜂种类的调查及优势种的找寻和应用,对进一步研究和提高赤眼蜂的繁殖和利用,稳定田间效果,起着重要的作用。为了弄清甘蔗田赤眼蜂种类,了解其优势种群,为今后甘蔗田利用赤眼蜂防治甘蔗螟虫提供理论根据,从1980年开始到1982年,我们在更多还原

【Abstract】 As the result of our survy, there are 4 species of Trichogramma, T. confusum, T. dendrolimi, T. ostrinis and T. japonicum, among them T. confusum is the dominant species. 3 exotic species, T. pretiosum, T. evanescens and T. cacoeciae were introduced from abroad and 2 species, T. dendrolimi and T. ostrinis were transmigrated from northern part of China during 1981-1982. Each was released for effecfive trial after a moderate number was provided by reproduction in insectaty. The rate of parasitized eggs of sugarcane yellow borer, Argyroploca schistacesns and striped borer, Chilo venosatus parasitized by these 5 species released was 65-95% and more 30% while was found with control. Each species was found at release site 6 months after release.An interesting phenomenon was observed that all the egg masses of the sugarcane borer were not parasitized by one species of Trichogramma but by two species, including T. confusum and one of other species released. The exotic species could’nt dominated a high parasitism rate but T. confusum, in general, dominated 65-88% of the parasitized egg masses. None of the exotic species could replace the dominace of T. confusum.更多还原