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Über der Ursprung des frühen Befalls der Sclerotinia‐Stengelfäule in Winterraps ( Brassica napus sub. sp. oleifera var. biensis ) im Großbritannien
Author(s) -
McQuilken M.P.,
Mitchell S. J.,
Archer S. A.
Publication year - 1994
Publication title -
journal of phytopathology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.53
H-Index - 60
eISSN - 1439-0434
pISSN - 0931-1785
DOI - 10.1111/j.1439-0434.1994.tb04806.x
Subject(s) - sclerotinia , sclerotinia sclerotiorum , biology , stem rot , mycelium , brassica , inoculation , horticulture , fungal pathogen , botany , agronomy , pathogen , immunology
Studies in artificially infested field plots of winter oilseed rape showed that mycelia originating from both sclerotia and ascospores of Sclerotinia sclerotiorum can initiate early attacks of sclerotinia stem rot. Disease symptoms appeared in early November in plots previously infested with sclerotia in September. There was a 6–7 week period from artificially inoculating plants with ascospores in October to observing disease symtoms in December. The primary sites of infection for both typesof inocula were the laminae and petioles of senescent and frost‐damaged leaves. Following primary infection, mycelia of the pathogen spread by plant to plant contact, causing secondary infections of neighbouring plants. Sclerotia developed on diseased plants and high numbers were returned to the soil. The importance of these findings to the epidemiology of the disease are discussed.