Green peach aphid, Myzus persicae (Sulzer), feeding behavior on the resistant potato species Solanum berthaultii Hawkes is characterized by a delay in probing, probes of shorter duration, and a decrease in total feeding time compared with the susceptible S. tuberosum cultivar ‘Hudson,’ The causal factor is associated with type B glandular trichomes. Removal of type B droplets resulted in a decrease in preprobe time compared with that on intact S. berthraultii leaves. Foliage of an F3 inter specific hybrid lacking type B trichomes did not deter feeding, Transfer of type B exudate to leaves of cv. Hudson produced a delay in probing compared with untreated leaves. The deterrence of type B exudate may reduce vector efficiency of the green peach aphid by delaying probing beyond the retention period of nonpersistent viruses such as potato virus y.
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Lapointe et al. (1984) studied this question.