Weedy Rice

Growers Need to Plant Certified or QA Seed to Combat Weedy Rice

Growers Need to Plant Certified or QA Seed to Combat Weedy Rice

A reminder that the requirement to plant a class of CCIA Certified Seed (foundation, registered or certified) or seed that has been inspected and passed their Quality Assurance program remains in place. Planting clean seed, free from weedy rice, is one of the most important measures to control the spread of this important pest in California rice. 

Weedy rice is one of the most prevalent and damaging weed pests in the U.S. reducing yields by an estimated six percent across the country. 

Currently, no herbicides are registered in California to control the weed, leaving clean seed programs, rouging and fallowing as the only options to combat the problem. 

Last year, weedy rice was observed on over 2,200 acres in the Sacramento Valley, according to UC Cooperative Extension. 

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Weedy Rice

Growers Should Consider Fallowing Worst Weedy Rice Fields This Year

By Whitney Brim-DeForest and Tim Johnson 

The absence of a registered herbicide to control weedy rice in California leaves growers with fewer options to control this important pest. Planting clean seed, as required by the Certification Act, is an important control measure and roguing can help control lower levels of infestation. For heavily infested fields, growers may want to consider fallowing, as outlined in the UCCE Weedy Rice Best Management Practices during this short water year. 

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