›› 2004, Vol. 47 ›› Issue (3): 293-297.

• RESEARCH PAPERS • Previous Articles     Next Articles

Oviposition-repelling activity of synthetic polyacetylenes and electroantennogram responses in Ostrinia furnacalis (Lepidoptera: Pyralidae)

WAN Shu-Qing, XU Han-Hong1, ZHAO Shan-Huan1, SHANG Zhi-Zhen2, JIANG Zhi-Sheng2, LIU Zhun2   

  • Online:2004-06-20 Published:2004-06-20

Abstract: Oviposition-repelling activity of 11 synthetic polyacetylene compounds and electroantennograms (EAGs) responses in the Asian corn borer, Ostrinia f urnacalis were assayed with the method of accepting egg on paper and EAG recording techniques. The results of bioassay indicated that the majority of tested compounds, except compound 1 and 10, could inhibit the oviposition behavior of O. furnacalis, and among these compounds compound 9 (1-phenyl-2,4-hexadiyne) was the most effective one. The inhibiting rate of compound 9 was from 61.27% to 85.71% at 20 μg/cm2 in 6 days of treatment. EAGs of the moths tested indicated that there were no obvious sexual differences to some tested compounds under concentra tion of 10 mg/mL, which could stimulate the receptors of antenna of the insect to produce action potential. Among these compounds, the most stimulating compounds were compound 6 (1-phenyl-4-(3-nitro)-phenyl-1,3-butadiyne) and compound 9: both compounds were significantly stronger in average EAG amplitude than other tested compounds, and the males responded more sensitively than females to the two compounds. The relative EAGs (Sr) of female and male to compound 6 were 68.2 2% and 106.60%, and to compound 9 were 199.19% and 220.60% at 10 mg/mL respectively. The dosage-responses of compounds 6 and 9 on EAGs showed that they were dose-dependent. The regression analysis of the data of two series showed that the value of depolarization amplitude of antenna receptors induced by the tested compounds correlated in some degree with inhibiting activity in behavioral test. Finally, the action target and relationship between structure and activity of polyacetylenes to O. furnacalis are discussed.

Key words: Polyacetylenes, Ostrinia furnacalis, oviposition-repelling activity, electroantennogram responses