Monitoring virulence change in yellow rust pathogen of wheat in Nepal

摘要

Yellow rust (Puccinia striiformis f.sp. tritici) is an important disease of wheat in Nepal. All recommended wheat varieties except one or two are susceptible to the rust. It caused high wheat grain yield losses in some areas of the country. Several control methods have been adopted to minimize the loss. One of the widely accepted eco-friendly methods is to use resistance gene/s. However, due to gradual change in virulence of the rust pathogen, resistance genes have not been very effective.