Myrothecium roridumandM. verrucariaPathogenic to Roots of Red Clover and Alfalfa

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Abstract
M. roridum and M. verrucaria were associated with rot sites on roots of field-grown red clover [Medicago-sativa] [Trifolium] and alfalfa [M. sativa]. Both species of Myrothecium caused root rot of red clover and alfalfa in controlled inoculations with or without wounding. No differences in cultivar responses were detected. Chlorosis, purpling of leaflet margins, and death of leaves and petioles occurred on inoculated plants but Myrothecium spp. could only be recovered from diseased roots. These fungi should be considered as additional causal agents in the root-rot complex of red clover and alfalfa.

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