First report of southern blight of common barley in Puerto Rico

In 1990-91, 96% of the test plants in a barley (Hordeum vulgare L.) winter nursery in Puerto Rico was lost to Sclerotium rolfsii. Small necrotic lesions (1-3 mm long) developed at the base of the stem, followed by wilting and general chlorosis as the lesions progressed and eventually girdled the bas...

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Bibliographic Details
Published in:European journal of plant pathology 1995-09, Vol.101 (5), p.497-501
Main Authors: ESNARD, J, HEPPERLY, P. R
Format: Article
Language:English
Subjects:
athelia
Biological and medical sciences
corticium rolfsii
Fundamental and applied biological sciences. Psychology
Fungal plant pathogens
Hordeum vulgare
Pathology, epidemiology, host-fungus relationships. Damages, economic importance
Phytopathology. Animal pests. Plant and forest protection
porto rico
puerto rico
Sclerotium rolfsii
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Summary:In 1990-91, 96% of the test plants in a barley (Hordeum vulgare L.) winter nursery in Puerto Rico was lost to Sclerotium rolfsii. Small necrotic lesions (1-3 mm long) developed at the base of the stem, followed by wilting and general chlorosis as the lesions progressed and eventually girdled the base of the stem. Sclerotia then developed on the plants at the stem base. Two morphologically different strains of S. rolfsii that were mycelial incompatible were isolated. This is the first report of a destructive blight due to S. rolfsii on field barley in the Caribbean. The apparent rate of disease increase (r) was estimated to be 12.2% per day using the logistic model, with an initial disease incidence of 0.042% (R super(2) = 0.89, p less than or equal to 0.001).
ISSN:0929-1873
1573-8469
DOI:10.1007/BF01874473