Simulation Modeling to Predict the Evolution and Dynamics of Glyphosate Resistance in Barnyardgrass in Cotton

Barnyardgrass is a troublesome weed in Midsouth cropping systems and it is one of those weed species that are at high risk of evolving resistance to repeatedly used herbicides. Barnyardgrass resistance has already been widespread for commonly used herbicides in Midsouth rice production systems. With the intensive selection pressure exerted by glyphosate in Midsouth cotton, it is likely that barnyardgrass will evolve resistance to glyphosate. Thus, measures to predict and mitigate such a situation is vital for the sustainability of glyphosate resistant cotton production in the Midsouth. We have developed a herbicide resistance simulation model for barnyardgrass to understand the evolution of resistance and identify suitable mitigation strategies.