Acta Entomologica Sinica (2005) 48, 922-927

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Jie-Xian Jiang, Ai-Ping Zeng, Xiang-Yun Ji and Zhu-Ru Jiang (2005)
[Vertical transmission of Spodoptera exigua nuclear polyhedrosis virus in the beet armyworm, Spodotera exigua]
Acta Entomologica Sinica 48 (6), 922-927
Abstract: The experiments were conducted to determine the transmission mode and rate of Spodoptera exigua nuclear polyhedrosis virus (SeNPV) from the infected parents to their progeny through feeding the 4th and 5th instar larvae with the concentrations of 2.8×107 and 2.8×106 PIBs·mL-1 in the laboratory. The results showed that SeNPV could be transmitted to the offspring by three modes, i.e. transovarian, transovum, and adult mating. The female-mediated vertical transmission test indicated that the adults developed from virus-infected larvae transmitted the virus to their progeny, resulting in 20%-48% mortality of the next generation (F1) and decrease of the fecundity of F1 progeny adults compared with untreated controls. Moreover, the experiment with surface of the egg sterilized by 5% formalin solution showed that SeNPV could be transmitted to larvae of F1 generation by transovarian transmission, which caused 18.8% mortality of F1 generation. The crossing experiments between virus-infected and non-infected females and virus-infected and non-infected males indicated that virus could also be transmitted to F1 generation by sperm of male adult, which caused 20%-40% mortality of offspring larvae. Furthermore, through the experiment of adult oral infection, it was found that SeNPV could also be transmitted to offspring at a prevalence rate of 28.6%.
(The abstract is excluded from the Creative Commons licence and has been copied with permission by the publisher.)
(original language: Chinese)
Database assignments for author(s): Ai-Ping Zeng

Research topic(s) for pests/diseases/weeds:
biocontrol - natural enemies
Research topic(s) for beneficials or antagonists:

Pest and/or beneficial records:

Beneficial Pest/Disease/Weed Crop/Product Country Quarant.

Spodoptera exigua
Spodoptera exigua multiple NPV (entomopathogen) Spodoptera exigua