blackgrass© Tim Scrivener
Herbicide-resistant blackgrass affects most wheat-growing regions of the UK at varying levels and is getting harder to control as resistant populations evolve and chemistry becomes more limited. There are three main types of resistance to a range of different modes of action, with ACCase and ALS target site resistance (TSR) and non-target site resistance (NTSR), especially enhanced metabolism (EMR), now widespread, according to Rothamsted Research. Combined TSR, where ACCase and ALS target site resistance mutations occur within the same plant, […]