作　　者： ; ; ;

机构地区： 华南农业大学资源环境学院

出　　处： 《应用生态学报》 2003年第12期2251-2254,共4页

摘　　要： 研究了烟粉虱两种寄生性天敌桨角蚜小蜂 (Eretmocerussp .)和粉虱座壳孢 (Aschersoniaaley rodis)单独使用和联合使用时对烟粉虱种群的控制作用 .结果表明 ,在单独进行控制时 ,在一个世代内按 5× 10 6个孢子·ml-1喷施粉虱座壳孢 2次 ,对烟粉虱种群的控制作用达 95 .74 % ,按每株植株 3头雌蜂的密度释放桨角蚜小蜂 2次 ,对烟粉虱种群的控制作用达 5 7.5 8% .在两者联合控制时 ,一个世代内喷施粉虱座壳孢 2次 ,再释放桨角蚜小蜂 1次或 2次 ,对烟粉虱种群的控制作用达 97.0 2 %～ 97.91% ,烟粉虱种群增长趋势指数低于 1,种群数量逐渐下降 .联合使用时 ,桨角蚜小蜂和粉虱座壳孢间无消极影响 . The effectiveness of Eretmocerus sp. and Aschersonia aleyrodis in controlling Bemisia tabaci populations on cucumber were determined in separated and combined greenhouse experiments. The results showed that after spraying A.aleyrodis (5×10 6 spores per ml,twice per generation) and releasing Eretmocerus sp. (3 female per plant,twice per generation),95.74% and 57.58% of whitefly populations were controlled,respectively. However,when the two natural enemies were used together with the same rate mentioned above ( A. aleyrodis spraying twice followed by releasing Eretmocerus sp. once or twice in one generation),97.02%～ 97.91 % of whitefly populations were controlled. Moreover,the increasing index of whitefly population (I) subjected to both natural enemies together was below 1,indicating the substantial reduction in whitefly population. The combined treatments provided a better control effect of whitefly than separated ones,and there was no contradicted effect between both natural enemies.

关 键 词： 烟粉虱 桨角蚜小蜂 粉虱座壳孢 控制效果

领　　域： [生物学]