<i>Myrothecium roridum</i>and<i>M. verrucaria</i>Pathogenic to Roots of Red Clover and Alfalfa

Abstract

clover and 36 alfalfa roots inoculated Leath, K. T., and Kendall, W. A. 1983. Myrothecium roridum and M. verrucaria pathogenic to with each isolate. Evaluations of rot roots of red clover and alfalfa. Plant Disease 67:1154-1155. symptoms and root elongation were made 6 days after inoculation. SlantMyrothecium roridum and M. verrucaria were associated with rot sites on roots of field-grown red board cultures were maintained in a clover and alfalfa. Both species of Myrothecium caused root rot of red clover and alfalfa in growth chamber with a 14-hr photope 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 (fluorescent and incandescent light at 300 inoculated plants but Myrothecium spp. could only be recovered from diseased roots. These fungi #E/m-/see-) at 25 ± 1 C and a 10-hr should be considered as additional causal agents in the root-rot complex of red clover and alfalfa. dark period at 15 ± 1 C. The severed-taproot pathogenicity test