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Issue:ISSN 2095-1353
           CN 11-6020/Q
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Your Position :Home->Past Journals Catalog->2024年61 No.3

The predation capacity of Neoseiulus bicaudus on Tetranychus turkestani in the presence of Frankliniella occidentalis
Author of the article:HU Heng-Xiao, MU Kai-Qin, FANG Chen, TANG Si-Qiong, SU Jie, ZHANG Jian-Ping
Author's Workplace:Agriculture College of Shihezi University, Key Laboratory of Oasis Agricultural Pest Management and Plant Protection Resources Utilization, Shihezi 832000, China
Key Words:Neoseiulus bicaudus; functional response; non-target prey; biological control
Abstract:

Abstract  [Aim]  To explore whether the presence of Frankliniella occidentalis (Perganda) affects the predation capacity of Neoseiulus bicaudus Wainstein on Tetranychus turkestani (Ugarov et Nikolskii). [Methods]  To determine the predation efficiency of N. bicaudus on T. turkestani in the presence of F. occidentalis, different developmental stages of T. turkestani (egg, larva, nymph, and adult female) were collected and placed into cages with 1st instar F. occidentalis at ratios of 20︰1,

10︰1 and 5︰1. T. turkestani alone served as the control group. F. occidentalis was then introduced to the treatment and control groups. [Results]  The functional response of N. bicaudus to T. turkestani remained consistent in the presence of F. occidentalis, continuing to exhibit a type-Ⅱ response. Compared to the control group, the attack rate (a) and handling time (Th) of N. bicaudus on the T. turkestani eggs and larvae significantly decreased. In contrast, there was a significant increase in the handing time (Th) of N. bicaudus for T. turkestani nymphs and adult females in the 5︰1 F. occidental treatment group (P<0.05). The presence of F. occidental had a significant effect on the feeding rate of N. bicaudus on T. turkestani (P<0.05). The feeding preference index D indicated that as the density of T. turkestani and proportion of F. occidental increased, N. bicaudus showed an increased preference for T. turkestani egg, but decreased preference for T. turkestani female adults. [Conclusion]  T. turkestani coexisting with F. occidentalis at a ratio of 5︰1 affects the predation of N. bicaudus on T. turkestani.

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