斯氏小盲绥螨在大棚上防治烟粉虱的研究与应用

评价斯氏小盲绥螨Typhlodromipsswirskii（Athias—Henriort）在我国日光大棚中对黄瓜上的烟粉虱Bemisiatabaci（Gennadius）控制作用。在不同温度条件下研究斯氏小盲绥螨以烟粉虱为猎物的试验种群生命表，以及在日光大棚中释放斯氏小盲绥螨控制黄瓜上的烟粉虱所取的防治效果。斯氏小盲绥螨取食烟粉虱的卵、成虫、若虫、伪蛹能完成世代并能正常产卵。在19—35℃范围内总产卵量25—41粒／雌，产雌率60％-62．68％。在（20±1）℃，（25±1）℃，（30±1）℃，（34±1）℃温度条件下斯氏小盲绥螨净增殖率（心）分别为12．6160、22．1021、17．4500、16．7463；内禀增长率（rm）分别为0．0865、0．1528、0．1535、0．1690。在大棚黄瓜上应用结果表明：释放斯氏小盲绥螨与目前大棚中的常规化学防治比较，生防区能有效地控制烟粉虱成虫、卵、若虫的种群数量增长。根据斯氏小盲绥螨和烟粉虱的生物学特性，结合大棚黄瓜栽培过程中的环境条件，笔者提出了在日光大棚中应用斯氏小盲绥螨控制黄瓜上烟粉虱的策略：在黄瓜生长的整个期间释放2—3次斯氏小盲绥螨，每20-25d释放1次，苗期每株释放20—25只，后期每株释放25～50只，才能达到预期效果。生防园每季减少农药使用次数5次。

Research on the application of Typhlodromips swirskii for the control of Bemisia tabaci

The life table parameters of Typhlodromips swirskii （Athias-Henriort） feeding on Bemisia tabaci（Gennadius） under different temperatures and the efficacy of releasing T. swirskii to control B. tabaci on cucumber crops in a plastic greenhouse were investigated. T. swirskii could prey on all life-stages of B. tabaci. The average fecundity of T. swirskii was 25--41 eggs per female at 19-35℃. The proportion of females in the T. swirskii population was 60%-62. 68%. The net reproductive rates of increase（ Ro ） of T. swirskii were 12. 6160,22. 1021, 17. 4500 and 16. 7463, and the intrinsic rates of natural increase （ rm ） were 0. 0865, 0. 1528, 0. 1535 and 0. 1690. The efficiency of controlling B. tabaci by releasing T. swirskii in a greenhouse was compared to that achieved by chemical control methods. The results indicate that T. swirskii is an effective bio-control for B. tabaci in the greenhouse environment.