Inter-relationship between shoot weight,severity of root rot and survival rate of subterranean clover inoculated with certain pathogenic fungi |
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Authors: | D H Wong M F D'antuono M J Barbetti K Sivasithamparam |
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Institution: | (1) Soil Science and Plant Nutrition Group, School of Agriculture, University of Western Australia, 6009 Nedlands, Western Australia;(2) Western Australian Department of Agriculture, Jarrah Road, 6151 South Perth, Western Australia |
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Abstract: | Summary Plant survival rate, root disease index and fresh shoot weight of subterranean clover seedlings inoculated with fungal pathogens
(Fusarium avenaceum, F. oxysporum, Phoma medicaginis, Pythium irregulare andRhizoctonia solani, both singly and in combinations) were generally inter-correlated over a wide range of temperature (10, 15, 20 and 25°C)
and moisture conditions (45, 65% water holding capacity and flooding). There was a negative correlation between root disease
index and shoot weight for all treatments exceptF. avenaceum + P. irregulare. Root disease index and seedling survival rate were negatively correlated except forF. oxygsporum, Phoma medicaginis, P. irregulare andF. oxysporum + F. avenaceum. However, a good positive correlation was found between the survival rate and shoot weight for all treatments with the exception
ofPhoma medicaginis. |
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Keywords: | Fungi Fusarium avenaceum Fusarium oxysporum Phoma medicaginis Pythium irregulare Rhizoctonia solani Root-rot Subterranean clover |
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