Severity of Foliar Symptoms and Root and Crown Rot of Soybean Inoculated with Various Isolates and Inoculum Rates ofFusarium solani

Abstract

Soybean plants (cvs. Spencer and Ripley) were grown in Cone-Tainers infested with different rates of sudden death syndrome (SDS) isolates of Fusarium solani. Soil inoculum rate significantly affected severity of root rot and percent leaflets of inoculated plants with SDS symptoms with isolate Mont-1. Leaf symptoms of SDS on Ripley were significantly less than on Spencer. When SDS isolate Cora-7 was used, only the soil inoculum rate was significant for percent leaflets with SDS symptoms and root rot severity. Nine SDS fungal isolates differed in the amount of root rot and severity of leaf symptoms that they produced on inoculated Spencer and Ripley plants.