›› 2003, Vol. 46 ›› Issue (6): 739-744.

• RESEARCH PAPERS • Previous Articles     Next Articles

Repellent effects of herbivoreinduced rice volatiles on the brown planth opper,Nilaparvata lugens Stl

ZHOU Qiang,XU Tao,ZHANG Gu-Ren,GU De-Xiang, ZHANG Wen-Qing*   

  • Online:2003-12-20 Published:2003-12-20
  • Contact: ZHANG WenQing

Abstract: Rice plants response to insect herbivory by synthesizing and releasing complex blends of volatiles, which provide important host location cues for herbivores and its natural enemies. The behavioral responses of adult brown planthopper, Nilaparvata lugens Stal to eleven herbivoreinduced rice volatile compounds were studied with a Ytube olfactometer. The results showed that four compounds, (E)-2-hexenal, (E)-2-hexen-1-ol,-2-heptanol and methyl salicylate,had significantly repellent effects on the adult brown planthopper under the tested concentrations(2-μL compounds were dissolved in 100 μL acetone respectively),however,seven other compounds,(E)-2-hexen-1-ol,-2-heptanone, limonene, ocimene, linalool,-β-caryophyllene and (E)nerolidol, had no significant effects on the selection behavior of the adult brown planthopper under the same concentration. Further experiments showed that the volatile compounds, (E)-2-hexenal and linalool,had no significant effects on the selection behavior of the adult brown planthopper at lower concentrations [(E)-2-hexenal (0.5 μL, 1 μL) and linalool (0.5 μL, 1 μL, 5 μL) were dissolved in 100 μL acetone respectively]. However,these volatile compounds had markedly repellent effects on the selection behavior of the adult brown planthopper at higher concentrations [(E)-2-hexenal(5 μL, 10 μL) and linalool(10 μL) were dissolved in 100 μL acetone respectively].

Key words: Rice, Nilaparvata lugens, herbivoreinduced plan t volatiles, repellent effects