Over the past several years, there have been several new weed species identified, including winged water primrose, six biotypes of weedy rice, and possibly two new species or sub-species of watergrasses. All of these instances occurred within the last 5-6 years and came as a relative surprise to the industry and growers. In the fall of 2019, a comprehensive weed survey took place by soil sampling from fields in each major rice-growing county. The objectives of this experiment were to conduct a survey of weed species and their distribution throughout the California rice-growing counties and to continue to address emerging weed issues in a timely manner.