Disease Note.

First Report of Rust (Uromyces ciceris-arietini) on Garbanzo (Chickpea) in the United States. J. R. Venette, Department of Plant Pathology, North Dakota State University, Fargo 58105. R. W. Stack, Department of Plant Pathology, North Dakota State University, Fargo 58105. Plant Dis. 71:101. Accepted for publication 1 October 1986. Copyright 1987 The American Phytopathological Society. DOI: 10.1094/PD-71-0101A.

Garbanzo rust, caused by Uromyces ciceris-arietini (Grogan) Jacz., was observed for the first time in the United States in 1985 on a 16-ha field of garbanzos (Cicer arietinum L. 'UC5' in east central South Dakota. The rust was detected in late August and within a few weeks had spread throughout the crop. The rust caused large pustules (up 10 I mm in diameter) often surrounded by chlorotic Zones up to 3 mm in diameter. The uredia and telia were found on both adaxial and abaxial surfaces of the leaves and produced uredospores and teliospores characteristic of the pathogen. Uredospores had scattered pores, large pore caps, and thick walls; teliospores were verrucose, not ridged. Garbanzo rust is prevalent in the garbanzo-growing regions of Mexico. The source of the rust in the north-central growing region of tbe United States is unknown. Severe white mold caused by Sclerotinia sclerotiorum (Lib.) de Bary and an unidentified root rot precluded assessment of crop damage caused by the rust.