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- 저자 : R. Talaei-Hassanloui (검색결과 1 건)
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M. Fazeli-Dinan,R. Talaei-Hassanloui,H. Allahyari 한국응용곤충학회 2016 Journal of Asia-Pacific Entomology Vol.19 No.4
The host preference in Encarsia formosawas studiedwhen parasitoid receiving signals related to either untreated and Lecanicillium longisporum-treated Trialeurodes vaporariorum. The experiments were done by the type two selection experiment. The third instar nymphs of T. vaporariorum were used as parasitoid host. Untreated hosts sprayed with Tween 80 as control and treated host infected by the three isolates of L. longisporum; LRC190, LRC216 and LRC229. Simultaneously, the healthy hosts were presented to parasitoid with the infected hosts at four time intervals: 0, 24, 48 and 72 h post-treatment. This investigation showed a highly significant preference of E. formosa towards the untreated host at 24, 48 and 72 h after fungi spraying.Whereas in 0 h after fungi treatment parasitoids could not discriminate between healthy and infected host therefore, therewas not a preference to host selection. The highest Manly's preference index (β) of parasitoid to choose healthy hosts in the simultaneous presence of infected hosts by isolates LRC190, LRC216 and LRC229 was estimated 0.88±0.02, 0.87±0.02 and 0.79±0.03, respectively at 72 h after spraying,while the lowest valuewas estimated 0.44±0.03, 0.49±0.4 and 0.52 ± 0.03, respectively, at 0 h after treatment. Overall we concluded that female parasitoid is capable recognize infected host in longer time intervals after treatment and prefers to lay on the uninfected ones. These results demonstrated the suitable adaptation of simultaneous application of E. formosa and L. longisporum for biological control of T. vaporariorum.
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