Water Quality

Thiobencarb Success Story

Thiobencarb Success Story

Thank you to all rice growers for successfully managing thiobencarb this year. A special thank you to the rice growers, pilots, applicators and PCAs who steward thiobencarb through usage, applications and recommendations.

This season’s thiobencarb monitoring results were virtually non-detects. One split sample at the lower end of the Colusa Basin Drain had a result slightly above the performance goal. This occurs because two labs use different reporting limits as a quality control measure built into the program. The next sampling event recovered to a non-detect at that site.

The County Agricultural Commissioners, Department of Pesticide Regulation and the Central Valley Water Board add to the stewardship and management of thiobencarb. Great job all!

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

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Thiobencarb Management Calendar

The information in this twelve-month chart is just a snapshot of the management necessary to maintain thiobencarb. At the CRC, we work to provide information on the management practices, stewardship updates and the monitoring results because product maintenance does not end with the last application, cumulation of all water-holds or the collection of the final water sample. Every person using, applying and recommending thiobencarb takes ownership in successful management of the herbicide. Management requires constant diligence and coordination with the growers, registrants, pilots, applicators, pest control advisers, county agricultural commissioners and state regulators to assure continual usage of this important herbicide. 


Thiobencarb Update with Exceedance Report

Monitoring results were at the performance goal of 1.5 µg/L on May 12 and May 28. The detections were noted at the Colusa Basin Drain 5 and Butte Slough 1 sites. On June 2, the duplicate sample for quality control had an exceedance of 1.8 µg/L while the standard lab result was at 1.2 µg/L. The samples were from the Colusa Basin Drain 1 site outside Knight’s Landing. All sampling results recovered to non-detection levels on June 4.