Abstract

                                Eight wheat varieties viz. NI-5439. NI-747-19, NI-146. Sonalika, DWR-39, MACS-1967, C-306 and WH-147 were evaluated for their tolerance to both black and brown rusts. All the varieties except NI-5439 and Sohalika have shown reduction in yield due to higher rust intensity. These two varieties, despite suffering heavily form stem and leaf rust infection under artificial epiphytotic condition of inoculation, suffered less so for as the grain yield is concerned. Thus these two varieties can be rated as tolerant.

Key words : Rust, Tolerance Mechanism, Wheat Varieties, Yield losses