sourceTaxonName: Phytophthora citricola
targetTaxonName: Juglans regia
localityName: Italy
referenceCitation: Belisario, A., Maccaroni, M., and Vannini, A.. 2003. First report of %Phytophthora nicotianae% and %P. citricola% associated with english walnut decline in Europe. Pl. Dis. 87:315