phytophthora parsiana, a new threat to almond trees and its host range expansion*

the distribution of phytophthora parsiana a high-temperature tolerant newly described species was studied in southern iran and examined its host range in woody perennial plant species in greenhouse condition under high inoculum potential. among different plant species examined, almonds were highly susceptible by different isolates. from 24 woody plants inoculated, the disease severity in descending orders were: prunus dulcis, p. armeniaca, pistacia vera cv. sarakhs, prunus dulcis var. fragilis, carica papaya, pistacia khinjuk, p. vera cv. badami, mangifera indica, p. mutica, platanus orientalis, , ficus carica and juglans regia. the pathogen was detected from soil and infected trees only in pistachio orchard in rafsanjan in kerman province and adjacent province yazd.