Abstract
Phytophthora clandestina caused pre- and post-emergence damping-off in subterranean clover under a range of soil temperature (10, 15, 20 and 30 °C) and moisture (65 and 100% WHC and flooding) conditions in a glasshouse. The greatest reductions in seedling survival occurred in saturated and flooded soil conditions. Most severe root disease occurred at a soil temperature of 10°, followed by 15 and 20°. P. clandestina interacted with F. oxysporum, but not with Fusarium avenaceum, Phoma medicaginis, Pythium irregulare and Rhizoctonia solani, to produce more severe root rot than did each fungus alone.
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