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Fungal infestation of seeds from seven populations of wild oats ( Avena fatua L.) with different dormancy and viability characteristics
Author(s) -
MORTENSEN K.,
HSIAO A. I.
Publication year - 1987
Publication title -
weed research
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.693
H-Index - 74
eISSN - 1365-3180
pISSN - 0043-1737
DOI - 10.1111/j.1365-3180.1987.tb00766.x
Subject(s) - avena fatua , biology , secale , seedling , avena , drechslera , alternaria alternata , fusarium , agronomy , hordeum vulgare , horticulture , botany , germination , poaceae
Summary Seeds from seven genetically inbred pure lines of wild oats ( Avena fatua L.) with different levels of dormancy and viability were analysed for seed‐borne fungi. All lines had fungi on the seeds. The predominating fungi were Alternaria alternata and Cladosporium herbarum , of which the latter was non‐pathogenic and the former only weakly pathogenic on seedlings of wild oats. Drechslera avenacea, Cochliobulus sativus and Fusarium spp., frequently isolated, were pathogenic on A. fatua. Only D. avenacea was host specific to A. fatua and cultivated oats Avena sativa. Cochliobolus sativus and Fusarium spp, were equal or more pathogenic on seedlings of wheat ( Triticum aestivum L.), barley ( Hordeum vulgare L.), oats and rye ( Secale cereale L.) than on seedlings of A. fatua. Drechslera avenacea occurred on a significantly higher percentage of seeds from A. fatua lines, AN 51 and AN 474, than from the other lines. Other fungi isolated occurred randomly on all A. fatua lines. There was no relationship between low viability of seeds and fungi carried on the seeds.