Effects of Herbicides on Root Rot of Pinto Bean, Weeds, and Two Soilborne Fungi. R. L. Gilbertson, Former Graduate Research Assistant, U.S. Department of Agriculture, Agricultural Research Service, Crops Research Laboratory, and Department of Plant Pathology and Weed Science, Colorado State University, Fort Collins 80523. E. G. Ruppel, and E. E. Schweizer. Plant Pathologist, and Plant Physiologist, U.S. Department of Agriculture, Agricultural Research Service, Crops Research Laboratory, and Department of Plant Pathology and Weed Science, Colorado State University, Fort Collins 80523. Plant Dis. 71:627-629. Accepted for publication 5 February 1987. This article is in the public domain and not copyrightable. It may be freely reprinted with customary crediting of the source. The American Phytopathological Society, 1987. DOI: 10.1094/PD-71-0627.

Under low and moderate disease severity in the field, herbicides did not significantly increase or decrease pinto bean root rot caused by Fusarium solani f. sp. phaseoli and Rhizoctonia solani. Treatments that included minimal (EPTC), moderate (EPTC plus trifluralin), and intensive (alachlor, EPTC, and trifluralin) levels of herbicides generally decreased weed populations in proportion to herbicide level but had no effect on soil population densities of F. solani or R. solani and little effect on bean yields.