A Note on an Outbreak of Cowpea Mild Mottle Virus (CPMMV) in Common Bean in the River Nile State, Sudan

Abstract

An outbreak of a devastating virus disease occurred in common bean
(Phaseolus vulgaris) in Berber area, the River Nile State, during the 2004/2005 cropping
season, with symptoms of stunting and yellowing. The disease incidence reached a level
of more than 85% in all visited fields. One hundred fifty symptomatic samples, collected
from different fields at Hudeiba, Berber and Shendi, were blotted on nitrocellulose
membranes and tested for the presence of different viruses, using the tissue blot
immunoassay (TBIA) technique. The results of the serological tests revealed that 95% of
the samples were positive for cowpea mild mottle virus (CPMMV). Among the common
bean genotypes screened for resistance to CPMMV, only RO/2/1 and Giza 3 were
resistant to the disease.