Water Quality

Water Quality •

Propanil Update for 2021

Propanil Update for 2021

The CRC received calls about concerns with the propanil SuperWHAM!® CA performance last year. We reached out to UPL, the registrant, and the company completed considerable research over the winter months. 

One rumor about the SuperWHAM!® CA product is the inclusion of carbaryl in the formulation. The UPL representatives researched records for the confidential statements of formula to verify no carbaryl exists in the formula. 

Carbaryl is a registered pesticide with a chemical abstract number (CAS No.), which means the insecticide would be listed on the label along with propanil and the formulated product. 

Remember carbaryl and propanil cannot be applied within 14-days or 15-days per label requirement. Any deviation of the application of these two restricted materials could result in a violation, most likely for use in conflict with the labeling. 

For more information, contact the CRC’s Industry Affairs Manager Roberta Firoved at rfiroved@calrice.org or (916) 206-5039.

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Rice Water Quality Programs Monitoring Update
Water Quality •

Rice Water Quality Programs Monitoring Update

Monitoring for 2025 is halfway complete.

The 2025 surface water monitoring under the RPP and WDR programs is ongoing.

For the Rice Pesticide Program (RPP), there have been a handful of detections in late May, none of which were above the agricultural drain performance goal.  The latest results from early June were non-detectable.  

The Rice Waste Discharge Requirements (WDR) surface water program is in an assessment year, which means additional sampling for pesticides and toxicity.

Pyrethroids used in rice have been reported in association with water toxicity at the upper Colusa Basin Drain this year for multiple events.  The California Rice Commission (CRC) sent out letters earlier this year requesting the use reporting information (to be submitted in the fall) for pyrethroid users in the area.  Algal water toxicity was reported in the Sacramento Slough near Karnak as well.  

The CRC continues to work on behalf of the industry to conduct required monitoring and interface in reporting with the Water Board.  Additional efforts are underway to assess and analyze water quality trends across the valley and gather information from industry on uses and operational patterns.

We appreciate the industry’s support of the regulatory programs and their good stewardship of the commercial products used and protection of the environment.

For more information, contact the CRC’s Industry Affairs Manager Craig Riddle at criddle@calrice.org.