The 8 Integrated Pest Management (IPM) Principles. Specific reference to Yellow Rust in Winter Wheat. The ability of the fungus causing yellow rust to overcome race specific genes is well know and documented; an early occurrence being in 1932 with the variety Vilmorin 23.  From there you may remember Perdix in 1966, Sleipner 1985, Robigus 2000 and Warrior in 2011.  These sudden degradation’s of varietal resistances make for spectacular newspaper headlines whist causing major