Field Reaction of Landrace Components of Red Mottled Common Bacterial Blight

Authors

James S. Beaver, University of Puerto Rico - MayaguezFollow
James R. Steadman, University of Nebraska- LincolnFollow
Dermot P. Coyne, University of Nebraska-LincolnFollow

Date of this Version

1992

Citation

HortScience 27(1):50-51. 1992.

Comments

Copyright 1992 American Society for Horticultural Science. Used by Permission.

Abstract

Field reaction of 25 red mottled bean ( Phaseolus vulgaris L.) genotypes to common bacterial blight [Xanthomonas campestris pv. phaseoli (Smith) Dye] was evaluated in Puerto Rico over 2 years. The average disease severity (percent leaf area with symptoms) was similar over years. The determinate red mottled genotypes had almost twice as much disease as indeterminate genotypes. Eight of the indeterminate genotypes had significantly less disease than the mean of the field experiments. These genotypes may serve as useful sources of resistance to common bacterial blight. The size of the chlorotic zone around necrotic lesions varied between growing seasons, showing that environment can influence the expression of common bacterial blight symptoms.