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为评估班氏跳小蜂Aenasius bambawalei Hayat对其寄主扶桑绵粉蚧Phenacoccus solenopsis Tinsley的控制作用,在实验室条件下(温度25±1℃,相对湿度70%±5%,光周期14L∶10D),研究了班氏跳小蜂对扶桑绵粉蚧3龄若虫、雌成虫的寄生功能反应及其自身密度效应。结果表明:寄生功能反应均符合HollingⅡ型方程,且受寄主密度和寄生物密度的影响。当扶桑绵粉蚧3龄若虫和雌成虫的密度分别大于15头/容器和10头/容器时,班氏跳小蜂的寄生量增加幅度开始减小;以瞬间攻击率/处理时间(α/Th)为评价指标,班氏跳小蜂雌蜂寄生扶桑绵粉蚧3龄若虫时,α/Th为21.1307,且大于雌蜂寄生雌成虫的情况(α/Th为6.2506);班氏跳小蜂寄生功能反应有较强的种内干扰作用,随着自身密度的增加,寄生效能逐渐降低;通过方程E=QP-m能很好地模拟班氏跳小蜂的寻找效应(E)与其自身密度(P)之间的关系,对于3龄若虫和雌成虫的模拟结果分别为E=0.2931P-0.6240和E=0.0944P-0.4840。本研究为利用班氏跳小蜂开展扶桑绵粉蚧生物防治提供了基础数据和方法。
In order to assess the control effect of Aenasius bambawalei Hayat on its host Phenacoccus solenopsis Tinsley, under laboratory conditions (temperature 25 ± 1 ℃, relative humidity 70% ± 5%, photoperiod 14L: 10D) , We studied the parasitic functional responses of Beauveria bassiana to the 3rd instar nymphs and female adults of Fusarium meleagrice and its own density effect. The results showed that all the parasitism responses accorded with Holling type Ⅱ equation and were affected by host density and parasite density. When the density of 3rd instar nymphs and female adults of Fusarium meleagridis was more than 15 per container and 10 per container respectively, the increase of parasitism of Beauveria bungeana began to decrease. The instantaneous attack rate / treatment time (α / Th) as the evaluation index, the average value of α / Th was 21.1307, which was higher than that of female parasitoids (α / Th was 6.2506) Bees parasitize the functional response has a strong intraspecific interference effect, with its own density increases, parasitic efficiency gradually reduced; through the equation E = QP-m can well simulate the search for the Beesley jumping bee (E) and its own Density (P), the results of simulation for 3rd instar nymphs and female adults were E = 0.2931P-0.6240 and E = 0.0944P-0.4840, respectively. This study provided the basic data and methods for the biological control of Fusarium graminearum by using the Beesian jumping bee.