Abstract
Strains of P. viridiflava were associated with crown and root rot of alfalfa (M. sativa) and wilt of birdsfoot trefoil (L. corniculatus). A test strain was capable of inducing necrosis and stunting of the roots of alfalfa, red clover (Trifolium pratense), and birdsfoot trefoil when the roots were wounded before inoculation. The alfalfa strain induced severe root and crown rot of alfalfa.