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本文记述了46种稻纵卷叶螟天敌在湖南省的地理分布,找出优势种天敌控制稻纵卷叶螟种群消长的动态。卵期以稻螟赤眼蜂(自然寄生率:长沙10-81%;石门82.2%)、拟澳洲赤眼蜂(自然寄生率:长沙5-21%;安仁22.7%)为优势种。幼虫期天敌优势种有纵卷叶螟绒茧蜂(自然寄生率:长沙8-48%;嘉禾3-74%;零陵10-30%)、拟螟蛉线茧蜂(麻阳自然寄生率1-14%)、螟蛉绒茧蜂(长沙自然寄生率5%)、赤带扁股小螟(自然寄生率:长沙37.5%;安仁26.4%)、螟蛉瘤姬蜂(长沙自然寄生率5-35%)、稻苞虫赛寄蝇(长沙自然寄生率10-40%)。蛹期天敌优势种有螟蛉瘤姬蜂(长沙自然寄生率16%)、纵卷叶螟黄脸姬蜂(长沙自然寄生率5%,吉首15%)、日本黑瘤姬蜂、广大腿小蜂(长沙自然寄生率50%)、次生大腿小蜂(长沙自然寄生率8.9%)、无脊大腿小蜂、螟黄抱缘姬蜂、双斑截腹寄蝇(石门自然寄生率80%)和稻苞虫鞘寄蝇(长沙自然寄生率5-33%)。紫云英田是多种天敌的越冬场所,紫云英开花期又是多种天敌的蜜源田,据1981-1982年在长沙、宜章、郴州等地调查,紫云英田中的天敌,共计30种(包括天敌昆虫29种,蜜蜂1种)。因此,要注意保护紫云英田中的天敌。
This paper describes the geographical distribution of 46 species of leaf roller, Chlamydia trachomatis in Hunan Province, and finds out the dynamics of controlling the population dynamics of the rice leaf roller with dominant species of natural enemies. The eggs were dominated by Trichogramma ostriniae (natural parasitism rate: 10-81% in Changsha and 82.2% in Shihmen), Trichogramma ostriniae (natural parasitism rate: 5-21% in Changsha and Anren in 22.7%). The larvae predators have the dominant species of leafworm Tetranychus cinnabarinus (natural parasitism: Changsha 8-48%; Golden Harvest 3-74%; Lingling 10-30%), the beetle Bombyx mandarina (natural parasitism rate 1 -14%), Bombyx mori larvae (5% natural parasitism in Changsha), Stem Borer (Bombycis niloticus: 37.5%, Anren 26.4%), Bombyx mori %), Rice budworm match fly (Changsha natural parasitic rate of 10-40%). The predominant species of the natural enemies of pupal stage were Bombyx mori (16% natural parasitism in Changsha), Yellow-faced Myrmecula vulgaris (5% natural parasitism in Changsha and 15% Jishou), Japanese Bombyx mandarinae, (50% of natural parasitism in Changsha), 17% of secondary thorn wasps (natural parasitism rate in Changsha 8.9%), Apis cepaciae Insect sheath flies (Changsha natural parasitic rate 5-33%). Ziyunyingtian is the overwintering place of many natural enemies. Ziyunying is also a source of many natural enemies at the flowering stage. According to the investigation of Changsha, Yizhang and Chenzhou in 1981-1982, the natural enemies of Ziyunyingtian have a total of 30 Species (including natural enemies of 29 species of bees, 1 species). Therefore, we should pay attention to protect the natural enemies in the field.