Rootstock Influence on Occurrence of<i>Homalodisca coagulata,</i>Peach Xylem Fluid Amino Acids, and Concentrations of<i>Xylella fastidiosa</i>

Abstract

The influence of three Prunus rootstocks-a domestic plum, a domestic peach, and a peach from Brazil-on the occurrence of the vector of phony peach disease, Homalodisca coagulata, was assessed in a 4-yr study in an experimental block of Flordaking peach (P. persica). Relationships between the amino acid profile of xylem fluid from scions, the concentration of Xylella fastidiosa in xylem fluid from roots, and leafhopper occurrence were also assessed. The vector was less numerous in trees on the Brazilian rootstock than in those on the domestic rootstock (...)