U.S. Department of Agriculture: Agricultural Research Service, Lincoln, Nebraska
Date of this Version
3-2017
Citation
ANNUAL REPORT OF THE BEAN IMPROVEMENT COOPERATIVE, No. 60, March 2017. Published by USDA.
Abstract
INTRODUCTION: In Brazil, at least nine species of virus have been reported infecting common bean (Phaseolus vulgaris L.) and cowpea (Vigna unguiculata (L.) Walp.). Among these, several stand out because of their predominance in the field: Cowpea severe mosaic virus (CPSMV - Secoviridae, Comovirus), Cowpea aphid-borne mosaic virus (CABMV - Potyviridae, Potyvirus) and Cucumber mosaic virus (CMV - Bromoviridae, Cucumovirus). The viruses that infect cowpea and common bean should be considered potential pathogens for lima bean (Phaseolus lunatus L.), mainly because they belong to the same botanical family and are cultivated simultaneously in the same areas. Considering the importance of lima bean and the acknowledged scarcity of information about viruses in this crop, a survey was carried out of RNA genome viruses, which cause mosaic diseases, in lima bean-producing regions in Piauí state, one of the main producers of this leguminous crop in Brazil. The data obtained reveal a predominance of CABMV and CMV, and an absence of CPSMV in the samples analyzed. The collection and analysis of more samples is ongoing, and will supply an overview of the distribution of these pathogens. It will also offer the possibility of detecting other species of virus, because symptomatic samples presented a negative result for the three species evaluated.
Comments
U.S. government work.