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| 海氏桨角蚜小蜂对MED烟粉虱与温室白粉虱的寄生行为 |
| Parasitism behaviors of Eretmocerus hayati on Bemisia tabaci MED and Trialeurodes vaporariorum |
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| DOI： |
| 中文关键词: 海氏桨角蚜小蜂 专性寄生蜂 烟粉虱 温室白粉虱 寄生行为 寄主取食 |
| 英文关键词:Eretmocerus hayati obligate parasitoids Bemisia tabaci Trialeurodes vaporariorum parasitizing behavior host-feeding |
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| 中文摘要: |
| 前期发现海氏桨角蚜小蜂Eretmocerus hayati是烟粉虱Bemisia tabaci的专性寄生蜂，却不能成功寄生温室白粉虱Trialeurodes vaporariorum。为了明确海氏桨角蚜小蜂对MED烟粉虱和温室白粉虱的寄生行为。在选择和非选择条件下，本研究通过行为学观察测定了海氏桨角蚜小蜂对MED烟粉虱和温室白粉虱2龄若虫的寄生行为。结果发现，海氏桨角蚜小蜂会在温室白粉虱上产卵，且在温室白粉虱偏好产卵于胸部，在烟粉虱偏好产卵于腹部。该蜂对两种粉虱的寄生行为主要包括触角击打、产卵针刺探与排卵、后足击打标记及取食。其中，对烟粉虱的刺探数量和寄生数显著高于温室白粉虱。对温室白粉虱的寄生时间（210.1 s）和取食时间（354.1 s）显著长于烟粉虱寄生时间（198.6 s）和取食时间（290.3 s）。同时在选择性试验中，该蜂对烟粉虱也存在显著的寄生行为偏好，对温室白粉虱存在显著的取食行为偏好。以上研究结果为进一步高效利用海氏桨角蚜小蜂防治烟粉虱和温室白粉虱害虫提供了依据。 |
| 英文摘要: |
| Eretmocerus hayati is an obligate parasitoid of Bemisia tabaci, but it cannot successfully parasitize Trialeurodes vaporariorum. To clarify the parasitic behavior of E. hayati on the MED biotype of B. tabaci and T. vaporariorum, this study determined the parasitic behavior of E. hayati on the second-instar nymphs of the mediterranean cryptic species (MED) biotype of B. tabaci and T. vaporariorum through ethological observations under both choice and no-choice conditions. The results showed that E. hayati displayed oviposition behavior on both B. tabaci and T. vaporariorum, but it had distinct preferences for the oviposition sites. Specifically, it deposited eggs on the thorax of T. vaporariorum, while targeting the abdomen of B. tabaci. The parasitic behaviors of E. hayati on the two whitefly species mainly include antennae tapping, ovipositor probing and oviposition, hind leg tapping for marking, and host-feeding. Among them, the number of probing and parasitization events on B. tabaci was significantly higher than those on T. vaporariorum. The parasitization time (210.1 s) and feeding time (354.1 s) on T. vaporariorum were significantly longer than the parasitization time (198.6 s) and feeding time (290.3 s) on B. tabaci. Meanwhile, the E. hayati also showed a significant preference for the parasitic behaviors on B. tabaci and a significant preference for the feeding behavior on T. vaporariorum under choice bioassay. The above research results provide a basis for the further efficient utilization of E. hayati in the control of whitefly pests. |
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