Invasive Species Compendium

Detailed coverage of invasive species threatening livelihoods and the environment worldwide

Abstract

First report of Fusarium solani on Utah sweetvetch in the United States.

Abstract

Utah sweetvetch (Hedysarum boreale) is a native American perennial nitrogen fixing legume used mainly in rangeland reclamation, soil rejuvenation, and erosion control. In June 2011, a field of Utah sweetvetch grown for seeds in central Oregon (USA) had approximately 15% of the plants exhibiting chlorosis, defoliation, stunting, wilting, and/or death. Dissection of the crown of symptomatic plants revealed discolored pinkish brown vascular tissue. Based on morphological characteristics, sequence analysis of the rDNA ITS region, and pathogenicity test, the causal agent was identified as F. solani. This is thought to be the first report of F. solani on Utah sweetvetch plants.