RICE SCIENCE ›› 2008, Vol. 15 ›› Issue (4): 326-330 .

• Research Paper • Previous Articles    

High Temperature Effects on Yeast-like Endosymbiotes and Pesticide Resistance of the Small Brown Planthopper, Laodelphax striatellus

ZHANG Xiao-jie 1, 2; YU Xiao-ping 1; CHEN Jian-ming 1   

  1. 1 Institute of Plant Protection and Microbiology, Zhejiang Academy of Agricultural Sciences, Hangzhou 310021, China; 2 College of Life and Environment Science, Hangzhou Normal University, Hangzhou 310036, China
  • Received:2008-07-28 Online:2008-12-28 Published:2008-12-28
  • Contact: YU Xiao-ping

Abstract: The newly-hatched nymphs of the small brown planthopper (SBPH), Laodelphax striatellus, including field and sensitive populations, were subjected to the high-temperature (35°C) treatment. The number of yeast-like endosymbiotes in SBPH reduced by 23.47%–34.23%, 57.86%–61.51% and 88.96%–90.71% after the high-temperature treatment for 1 d, 2 d, and 3 d, respectively. However, the size of yeast-like endosymbiotes was not obviously affected. Resistance of SBPH to three insecticides (imidacloprid, chlorpyrifos and fipronil) decreased with the increase of treatment time.

Key words: Laodelphax striatellus, yeast-like endosymbiote, high temperature, pesticide resistance, insect pest