【摘要】 为评估腰带长体茧蜂Macrocentrus cingulum对亚洲玉米螟Ostrinia furnacalis的控害潜能,在实验室条件下(湿度60%～80%,光周期16L:8D)研究了20、24、28、32℃下腰带长体茧蜂对亚洲玉米螟幼虫的寄生功能反应和20、24、28℃下腰带长体茧蜂的自身密度干扰效应。结果表明:在20～32℃内,腰带长体茧蜂对亚洲玉米螟的寄生功能反应均符合HollingII型;相同温度下,随着寄主亚洲玉米螟密度的增加,腰带长体茧蜂寄生量增加,但当寄主密度增加到一定数量后,寄生量趋于稳定。24℃的寄生效能最大,20℃最小。随着寄主亚洲玉米螟密度和腰带长体茧蜂密度的增加,搜寻效应逐渐降低。采用Hessell干扰模型,发现28℃时的搜寻常数Q和干扰效应m均为最大,腰带长体茧蜂个体间的干扰效应降低了其寄生效能。更多还原

【Abstract】 In order to evaluate the control potential of Macrocentrus cingulum to Ostrinia furnacalis, functional responses of M. cingulum to the larva of O. furnacalis at 20, 24, 28, 32 ℃ and the self-interference effect of M.cingulum at 20, 24, 28 ℃ were examined under laboratory conditions(RH 60%—80%, 16 L:8 D).The results showed that, between 20—32 ℃, the functional responses fitted well with the Holling type II model. At a certain temperature, the number of parasitized larvae responded positively to host density and reached a peak when the host density increased to a certain amount. The parasitism efficiency was the largest at 24 ℃ and the lowest at 20 ℃.Therefore, 24 ℃ is the suitable temperature for M. cingulum. The searching efficiency of M. cingulum decreased with the increase of O. furnacalis and M. cingulum densities. According to the Hassell model, both the searching coefficient Q and the disturbance coefficient m maximized at 28 ℃and minimized 20 ℃, indicating that the interference in M. cingulum might reduce its parasitism efficiency.更多还原