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Selection methods for determining resistance of carnation cultivars to Fusarium oxysporum f.sp. dianthi
Author(s) -
BENYEPHET Y.,
REUVEN M.,
MOR Y.
Publication year - 1993
Publication title -
plant pathology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.928
H-Index - 85
eISSN - 1365-3059
pISSN - 0032-0862
DOI - 10.1111/j.1365-3059.1993.tb01531.x
Subject(s) - carnation , biology , cultivar , fusarium wilt , fusarium oxysporum , dianthus , horticulture , greenhouse , caryophyllaceae , inoculation , plant disease resistance , fungi imperfecti , botany , agronomy , biochemistry , gene
The level of resistance of carnation ( Dianthus caryophyllus ) cultivars to wilt caused by Fusarium oxysporum f.sp. dianthi was compared in root‐dip‐inoculated plants grown in pots (filled with tuff or sandy soil) in a greenhouse and plants grown in a field where the soil was artificially infested with the fungus. In the field, wilt symptoms appeared first in susceptible and subsequently in resistant cultivars; none was immune. Variations in the level of resistance were expressed either by different percentages of wilted plants (i.e. disease incidence) or by delayed disease progress as compared to a susceptible cultivar. The range of disease severity in the field, ranked on a scale from 0 to 4, was highly and significantly correlated with the percentage of diseased plants. The greenhouse test was unreliable as a predictor of the degree of resistance observed in the field. Similar wilt levels in the greenhouse and the field were found only in susceptible cultivars.