Effects of volatiles from different trophic level on foraging behavior of Aphidius avenae

Abstract

Abstract: The responses of female Aphidius avenae to volatiles from undamaged wheat plant,Sitobion avenae and Rhopalosiphum padi,aphids-plant complexes and aphids damaged plant were investigated in wind tunnel and Y-tube olfactometer.The volatiles from undamaged wheat plant, S. avenae and R. padi were much less attractive to A. avenae than those from aphids-plant complexes and aphids-damaged plant.Although the parasitic rate was much lower,the R. padi-plant complexes and R. padi damaged plant were also attractive to A. avenae. Identification of volatiles by GC-MS showed that the main volatiles induced by aphids feeding were 2-camphene, 6-methyl-5-hepten-2-one, 6-methyl-5-hepten-2-ol, Z-3-hexenyl-acetate,and methyl salicylate,among which, 6-methyl-5-hepten-2-one and 6-methyl-5-hepten-2-ol were more attractive to A. avenae, while methyl salicylate was not attractive.

Key words: Aphidius avenae, Sitobion avenae, Rhopalosiphum padi, Volatiles, GC-MS

CLC Number:

Q966

LIU Yong, HU Cui, NI Hanxiang, SUN Jingrui. Effects of volatiles from different trophic level on foraging behavior of Aphidius avenae[J]. Chinese Journal of Applied Ecology, 2001, (4): 581-584.

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