UC Rice Blog

Stem rot is a common rice pathogen present in all fields. The pathogen produces resting structures called sclerotia that survive in the soil after harvest. The sclerotia germinate in the spring and the pathogen infects tillers at the water level approximately when plants reach panicle initiation (45 to 50…

Additional authors: Sophie Allen, UCD Jr. SpecialistPyrethroids are heavily relied upon for management of tadpole shrimp in California rice. Their efficacy has historically been excellent (and mostly still is!); they have proven both effective and very economical given their low material costs, in particular…

Interest in drill-seeded no-till rice has increased in recent years; however, the most comprehensive herbicide research in drill-seeded rice systems was conducted before 2015, more than 10 years ago. Transitioning from water-seeded to drill-seeded rice, whether tilled or no-till, substantially alters weed…

The California Rice Research Board supports our statewide variety trail evaluation each year. This project runs nine variety trails around the state and evaluates commercially available lines as well as promising lines that are coming out of the Rice Experiment Station. These are large trails with each one…

In California, 533,000 acres of rice were planted in 2025, which is the highest amount since 2016. Some of this increase in acreage was seen in San Joaquin County which planted 15,000 acres in 2025. There has been a steady increase in acreage in this county since 2017 when only 3000 acres were planted. …