Institute of Entomology of Guizhou University, Provincial Key Laboratory for Agricultural Pest Management of the Mountainous Regions, Guiyang, China.
Department of Plant Protection, Faculty of Agriculture, University of Van Yüzüncü Yıl, Van, Turkey.
Pest Manag Sci. 2021 Apr;77(4):1851-1863. doi: 10.1002/ps.6210. Epub 2020 Dec 22.
Habrobracon hebetor (Hymenoptera: Braconidae) is a gregarious ectoparasitoid that attacks the larvae of several species of pyralid and noctuid moths. The reproduction and population dynamics of parasitoids in general are affected by host deprivation. However, how host deprivation affects H. hebetor is unknown. The effect of host deprivation on the parental generation, life table parameters, and the paralysis rate of the F generation of H. hebetor were evaluated using the age-stage, two-sex life table under laboratory conditions.
The results indicated that the greatest longevity and the least lifetime fecundity of the F generation occurred after 19 days of host deprivation (PW-20 treatment). The life table parameters (intrinsic rate of increase, r; finite rate of increase, λ; and net reproductive rate, R ) and the paralysis rate parameters (net paralysis rate, C ; transformation rate, Q ; stable paralysis rate, ψ; and finite paralysis rate, ω) of F individuals after PW-20 treatment were significantly higher than those of individuals subjected to the control treatment (no host deprivation). However, no difference was detected between the two host deprivation treatments: host deprivation after 1 day of host contact and immediate host deprivation (PW treatment).
Our results demonstrated that the effectiveness of H. hebetor did not decrease even during host deprivation for 19 days. Meanwhile, it was observed that mass rearing of the parasitoid could be improved by providing 10 individuals of 5th instar larvae of Ephestia elutella (Lepidoptera: Pyralidae) with a 20% honey-water solution. © 2020 Society of Chemical Industry.
赭赤眼蜂（膜翅目：小蜂科）是一种群居外寄生蜂，可攻击多种夜蛾和螟蛾幼虫。寄生蜂的繁殖和种群动态一般受寄主剥夺的影响。然而，寄主剥夺对赭赤眼蜂的影响尚不清楚。本文在实验室条件下，采用龄期-两性生命表，评估了寄主剥夺对赭赤眼蜂亲代世代、生命表参数和 F 代麻痹率的影响。
结果表明，在经历 19 天的寄主剥夺（PW-20 处理）后，F 代的最长寿命和最低终生产卵量最高。F 个体的生命表参数（内禀增长率 r、有限增长率 λ 和净生殖率 R）和麻痹率参数（净麻痹率 C、转化率 Q、稳定麻痹率 ψ 和有限麻痹率 ω）在 PW-20 处理后显著高于对照组（无寄主剥夺）。然而，在两种寄主剥夺处理之间（接触寄主 1 天后的寄主剥夺和立即寄主剥夺，PW 处理）未发现差异。
研究结果表明，即使在 19 天的寄主剥夺期间，赭赤眼蜂的效果也不会降低。同时，观察到通过向 10 头 5 龄期黄粉虫（鳞翅目：螟蛾科）幼虫提供 20%的蜂蜜水溶液，可以改善该寄生蜂的大规模繁殖。 © 2020 英国化学学会。
