C. Johansson et al., INTERSPECIFIC RECOGNITION THROUGH ODORS BY APHIDS (STERNORRHYNCHA, APHIDIDAE) FEEDING ON WHEAT PLANTS, European journal of entomology, 94(4), 1997, pp. 557-559
In olfactometric experiments a wingless adult of Sitobion avenae was a
ttracted by odours of a wingless adult of Rhopalosiphum padi feeding o
n a wheat plant. When the stimulus consisted of either a wingless R. p
adi without plant material or a wheat plant that had previously been i
nfested by a wingless R. padi, the response by S. avenae was not signi
ficant, suggesting that recognition is due to volatiles produced by th
e combination of an aphid and a plant.