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Cultural characteristics and pathogenicity of Melanconium juglandinum
Author(s) -
Belisario A.
Publication year - 1999
Publication title -
european journal of forest pathology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.535
H-Index - 49
eISSN - 1439-0329
pISSN - 0300-1237
DOI - 10.1046/j.1439-0329.1999.00165.x
Subject(s) - juglans , conidium , inoculation , mycelium , canker , biology , pathogenicity , fungus , horticulture , virulence , germination , botany , microbiology and biotechnology , biochemistry , gene
Summary Cultural characteristics and pathogenicity of Melanconium juglandinum , the agent of the black pustular dieback of Juglans spp. in Europe were investigated. Melanconium juglandinum was consistently isolated from diseased twigs and branches of Persian (English) walnut trees ( Juglans regia ) in Central Italian Apennine valleys. In growth and conidia germination tests, the fungus was shown to be active within a broad range of temperatures (5–30°C), with the optimum being between 20 and 30°C. Monthly artificial inoculations performed over a period of 2 years with mycelial plugs on 2‐year‐old seedlings of Persian (English) walnut developed symptoms within 15 days with maximum canker length occurring when inoculation was carried out between June and August. Koch's postulates were fulfilled and M. juglandinum was proved to be a virulent pathogen.