Acta Entomologica Sinica (2005) 48, 866-870

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Yong-Ping Liu, Fang-Hai Wang, Zhi-Jian Su, Guang-Hong Li and Yi Pang (2005)
[Effect of juvenile hormone analogues on multiplication of Spodoptera litura nucleopolyhedrovirus]
Acta Entomologica Sinica 48 (6), 866-870
Abstract: The influences of juvenile hormone analogues (JHA) on multiplication of Spodoptera litura nucleopolyhedrovirus were studied. The early 6th instar larvae of Spodoptera litura were infected with four concentrations of SpltNPV, 5×106, 1×107, 5×107and 1×108 PIBs/mL, respectively, and then treated with 10 µg methoprene (a JHA) per larva. The results indicated that the total virus yield of the four concentration treatments with virus and methoprene increased by 227.06%, 128.71%, 52.62% and 33.15% than that of the control with virus and acetone, the mean yield per larva increased by 49.15%, 48.40%, 36.40% and 31.11% and the mean mortality increased by 119.21%, 52.72%, 12.64% and 1.12%, respectively. The greatest virus yield was obtained when the larvae were infected by 1×107 PIBs/mL and then treated with 10 µg methoprene per larva, and the total virus yield and the mean virus yield per larva were 1 701.8×108 PIBs and 60.1×108 PIBs respectively. The virus yield of every treated group was significantly greater than that of the control group. Furthermore, the effects of methoprene on digestive physiology of infected and non-infected host were also studied. The results showed that not only the life duration and food consumption of 6th instar larvae were increased, the food conversion efficiency and virus yield of the larvae treated with methoprene were also increased significantly.
(The abstract is excluded from the Creative Commons licence and has been copied with permission by the publisher.)
(original language: Chinese)

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

Pest and/or beneficial records:

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

Spodoptera litura nucleopolyhedrovirus (entomopathogen)