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Host stage preference in the parasitoid wasp, Eretmocerus delhiensis, for parasitism and host-feeding
International Journal of Tropical Insect Science ( IF 1.2 ) Pub Date : 2021-05-05 , DOI: 10.1007/s42690-021-00549-w
Jafar Ebrahimifar , Arsalan Jamshidnia

The parasitoid wasp, Eretmocerus delhiensis Mani (Hym., Aphelinidae), is an active ecto-endo and solitary parasitoid in southwestern Iran. To evaluate Er. delhiensis as a biocontrol agent against the greenhouse whitefly, Trialeurodes vaporariorum (Westwood) (Hem., Aleyrodidae) its host stage preference for parasitism and host-feeding was investigated. In this study, choice (multiple-instar) and no-choice (single-instar) tests were conducted under laboratory standard conditions. The results of both tests indicated that Er. delhiensis fed on and parasitized all T. vaporariorum nymphal instars but preferred the 2nd and 3rd nymphal instars for host-feeding and parasitism, respectively. Moreover, it showed the highest and lowest development times were in the 3rd and 1st nymphal instars, respectively. According to our findings, parasitism of the parasitoid wasp, Er. delhiensis, along with its host-feeding on the nymphal instars of the greenhouse whitefly could prove it to be a good candidate for suppressing the greenhouse whitefly populations.



中文翻译:

寄生性黄蜂Eretmocerus delhiensis寄主阶段对寄生虫和寄主的偏好

寄生蜂黄蜂Eretmocerus delhiensis Mani(Hym。,Aphelinidae)是在伊朗西南部活跃的外生-内生和孤生寄生虫。评估Er。研究了作为温室白粉虱的生物防治剂的德里黑麦草(Triwoodurodes vaporariorum,Westwood)(Hem。,Aleyrodidae),其寄主阶段对寄生虫和寄主的偏好。在这项研究中,选择(多龄)和无选择(单龄)测试是在实验室标准条件下进行的。两种测试的结果均表明为Er。delhiensis取食和寄生所有温室白粉虱若虫龄,但更喜欢第二和第三若虫龄,分别用于寄主喂养和寄生。此外,它显示最高和最低的发育时间分别在三龄和一龄若虫龄。根据我们的发现,寄生的黄蜂是寄生的。delhiensis及其在温室粉虱的若虫幼虫上的寄主摄食可以证明它是抑制温室粉虱种群的良好候选者。

更新日期:2021-05-05
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