Herbicide Resistance Management in Rice: Annual Field Survey of California Rice Weeds Helps Establish a Weed Management Decision Framework

Abstract

The article presents an annual field survey by the University of California as a manner of herbicide resistance management for California rice growers. Submitted weed seed samples are tested against registered herbicides which achieved no control that field season. All labelled herbicide modes of action for each specific weed species were tested and applied according to their respective labels. Analyses of these experiments and survey data from 2015 to 2021 provide an active weed management decision-making framework for growers and a comprehensive overview of herbicide weed management in California rice.