Light Brown Discoloration of Tomato Roots Caused by Fusarium oxysporum. Nina Shishkoff, Postgraduate Research Plant Pathologist, Department of Plant Pathology, University of California, Davis 95616. R. N. Campbell, Professor, Department of Plant Pathology, University of California, Davis 95616. Plant Dis. 74:894-898. Accepted for publication 22 May 1990. Copyright 1990 The American Phytopathological Society. DOI: 10.1094/PD-74-0894.

Light brown discoloration (LBD) of tomato is a distinct, minor disease caused by isolates of Fusarium oxysporum that are of the saprophytic type and do not cause wilt symptoms in tomato or other vegetable crops. No significant interactions with Pyrenochaeta lycopersici, causal agent of corky root, were observed in greenhouse trials.