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Effects of prolonged mass rearing on life history traits of Habrobracon hebetor (Hymenoptera: Braconidae)
International Journal of Pest Management ( IF 1.1 ) Pub Date : 2020-10-09 , DOI: 10.1080/09670874.2020.1830198
Fatima Badran 1 , Yaghoub Fathipour 1 , Abdoolnabi Bagheri 2 , Mohammadreza Attaran 3 , Gadi V. P. Reddy 4
Affiliation  

Abstract

Long-term mass rearing of parasitoids under laboratory conditions may affect their quality. We studied the quality of Habrobracon hebetor (Say) (Hymenoptera: Braconidae) reared for more than 20 generations (G) using two-sex life table parameters. We found that G2 had the longest pre-adult development time (12.4 d) and the highest fecundity (1304.00 eggs/female) compared with the other generations. While no significant differences in the intrinsic rate of increase (r) and net reproductive rate (R0) were found among G4, G6, G8, G15, and G20, the highest values of r (0.3273 day−1) and R0 (436.28 eggs/individual) as well as the shortest mean generation time (T) were observed in G10. In addition, significant differences in sex ratio (F/F + M) were observed among different generations, ranging from 17% in G2 to 60% in G10. These results suggest that up to a certain number of generations (G10), the quality of H. hebetor significantly increased without adding field-collected parasitoids or changing the factitious host. To maintain the quality of the colony beyond this point, it should be rejuvenated by periodically adding field-collected individuals.



中文翻译:

长期大规模饲养对 Habrobracon hebetor (Hymenoptera: Braconidae) 生活史特征的影响

摘要

在实验室条件下长期大规模饲养寄生蜂可能会影响其质量。我们使用两性生活表参数研究了饲养超过 20 代 (G)的Habrobracon hebetor (Say) (Hymenoptera: Braconidae) 的质量。我们发现,与其他世代相比,G2 的成年前发育时间最长(12.4 d)和最高的繁殖力(1304.00 个卵/雌)。虽然G4、G6、G8、G15 和 G20的内在增长率 ( r ) 和净繁殖率 ( R 0 ) 没有显着差异,但r (0.3273 天-1 ) 和R 0 ( 436.28个鸡蛋/个体)以及最短的平均世代时间(T ) 在 G10 中观察到。此外,性别比(F/F+M)在不同代之间存在显着差异,从 G2 的 17% 到 G10 的 60% 不等。这些结果表明,直到一定数量的世代(G10),H. hebetor的质量显着提高,而无需添加现场采集的寄生蜂或改变人为宿主。为了在这一点之后保持群体的质量,应该通过定期添加野外采集的个体来使其恢复活力。

更新日期:2020-10-09
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