›› 2007, Vol. 50 ›› Issue (5): 448-453.

• RESEARCH PAPERS • Previous Articles     Next Articles

The effect of volatile infochemicals on host selection behavior of Trichogramma ostriniae

LIAN Yong-Guo, WANG Su-Qin, BAI Shu-Xiong, KANG Zong-Jiang, WANG Zhen-Ying, MO Tie-Lu   

  1. (College of Plant Protection, Shandong Agricultural University, Tai'an 271000, China; Institute of Plant and Environmental Protection, Beijing Academy of Agricultural and Forestry Sciences, Beijing 100097, China)
  • Online:2007-06-08 Published:2007-10-20
  • Contact: WANG Su-Qin, MO Tie-Lu

Abstract: The effect of hexane extracts of Asian corn borer (ACB), Ostrinia furnacalis (Guenée ) female moth scale, egg masses and accessory glands of their different physiological stages on host selection behavior of Trichogramma ostriniae were measured by using a Y-tube olfactometer in the laboratory. The results indicated that the hexane extracts of ACB scale at the concentrations 0.5 mg/mL and 1 mg/mL exhibited significant attraction for T. ostriniae. The hexane extracts of ACB egg masses at the concentrations 5 egg masses/mL and 10 egg masses/mL clearly stimulated intensive search behavior by T. ostriniae females; the hexane extract of ACB egg masses at the concentration 40 egg masses/mL, however, had extremely significant repellent action to T. ostriniae females. The hexane extract of female accessory glands of mated-females before their first oviposition and at the earlier stage after oviposition stimulated intensive search behavior by T. ostriniae females; the hexane extract of female accessory glands of virgin females and the older stage after oviposition, however, did not elicit the parasitoid's reaction. The hexane extracts of female accessory glands and egg masses elicited stronger reaction by the parasitoid, but without significant difference between both.

Key words: Ostrinia furnacalis, Trichogramma ostriniae, volatile infochemicals, hexane extract, host selection behavior