Virulence of Anastomosis Groups ofRhizoctonia solaniandRhizoctonia-like Fungi on Selected Germ Plasm of Snap Bean, Lima Bean, and Cowpea

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Abstract
R. solani AG-4 and AG-2 type 2, indigenous to the Georgia coastal plain [USA], were highly virulent on cultivars of snap bean, lima bean, pole bean and cowpea. Snap bean breeding lines B4175, B4173-2X, 208-8R, 5185 R, and Venezuela 54 were more resistant to high inoculum densities (187 and 492 colony-forming units [cfu] per 100 g of soil) of AG-4 than ''Eagle'' snap bean, but at 16 cfu/100 g of soil, there were no significant differences. None of the snap bean breeding lines were resistant to R. solani AG-2 type 2. R. solani AG-2 type 1 was highly virulent on cowpea cultivars and slightly to moderately virulent on beans. Rhizoctonia-like CAG-5 was moderately virulent on ''PI 165426'' and ''Jackson Wonder'' lima bean. CAG-3 was highly virulent on cowpea cultivars, and CAG-4 was avirulent.