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Journal of Tea Science ›› 2011, Vol. 31 ›› Issue (2): 100-104.doi: 10.13305/j.cnki.jts.2011.02.004

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The Susceptibility Difference against EoNPV in Different Geographic Populations of Tea Geometrid(Ectropis oblique Prout)

XI Yu1,2, YIN Kun-shan1, XIAO Qiang1*   

  1. 1. Tea Research Institute of Chinese Academy of Agricultural Sciences, Hangzhou 310008, China;
    2. Graduate school of Chinese Academy of Agricultural Sciences, Beijing 100081, China
  • Received:2010-09-20 Revised:2011-01-02 Online:2011-04-15 Published:2019-09-06

Abstract: The experiment of bioassay among 7 different geographic populations of tea geometrid was conducted to investigate the susceptibility difference against EoNPV. The results indicated that, there was a significant susceptibility difference against EoNPV in different geographic populations. Hangzhou population (HZ) and Yixing population (YX) have higher degree of susceptibility than that of others, and all larvae died in the 11th day after fed with EoNPV, with the median lethal concentration values were 8.32×104PIB/mL and 8.61×104PIB/mL respectively. The other 5 populations showed lower susceptibilities, and the mortality rates were under the 30% after 11-day EoNPV feeding, the median lethal concentration values were between 1.35×107PIB/mL and 6.03×107PIB/mL. Compared with the susceptible population (YX), the virulence ratio of EoNPV on the resistant population (Quzhou population, QZ) reached up to 724.5 fold.

Key words: Ectropis oblique Prout, geographic population, EoNPV, bioassay, susceptibility difference

CLC Number: