Fig. 1.

Experiment set up: (A) Artificial feeding of Metcalfa pruinosa. Individual insects, closed in an isolated chamber, feed on a Psa-inoculated solution (in grey). The population of Psa in the insect is subsequently determined. (B) Transmission of Psa from M. pruinosa adults, fed with a medium containing the bacterium, and subsequently transferred on healthy kiwifruit leaves. (C) Transmission of Psa from M. pruinosa adults, fed on experimentally inoculated kiwifruit plants, and subsequently transferred on healthy ones.