Journal of Insect Science (2020) 20 (5 - ieaa099)

Cao Zhou, Xi-bin Yang, Hong Yang, Gui-yun Long and Dao-chao Jin (2020)
Effects of sublethal concentrations of insecticides on the fecundity of Sogatella furcifera (Hemiptera: Delphacidae) via the regulation of vitellogenin and its receptor
Journal of Insect Science 20 (5 - ieaa099)
Abstract: White-backed planthopper (Sogatella furcifera, Hemiptera: Delphacidae) is an important migratory pest of rice. It causes severe economic losses by reducing crop production. Vg and VgR are important proteins that help in the successful reproduction of insects and have been studied in many insects. To understand the molecular mechanisms underlying the effects of insecticides on white-backed planthopper reproduction, we studied the expression profiles of SfVg, SfVg-like, and SfVgR in white-backed planthopper exposed to insecticides. SfVg and SfVgR silencing inhibited the ovarian development, number of eggs laid by, and hatching rate of white-backed planthopper. Thiamethoxam LC₁₀ significantly inhibited SfVg-like and SfVgR expression. In contrast, triazophos LC₂₅ significantly promoted SfVg, SfVg-like, and SfVgR expression and increased vitellogenin content in white-backed planthopper. These results demonstrate that insecticides can regulate the reproduction of white-backed planthopper by altering the expression of SfVg and SfVgR, thereby affecting the population density of white-backed planthopper. These findings build a foundation for improving our understanding of the molecular mechanisms underlying the effects of insecticides on the reproduction and resurgence of pests.
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Database assignments for author(s): Dao-Chao Jin

Research topic(s) for pests/diseases/weeds:
control - general

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Pest and/or beneficial records:

Beneficial	Pest/Disease/Weed	Crop/Product	Country	Quarant.
	Sogatella furcifera	Rice (Oryza)	China (south)