The CRC will provide growers an easy way to complete the annual thiobencarb stewardship training this year – online! Future communications and links to this training will be forthcoming from the Commission very soon.
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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.
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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.
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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.
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Valent has provided the following stewardship message for the rice industry regarding thiobencarb usage.
Monitoring results are nearing the performance goal exceedance from results collected May 12. Memorial Day weekend typically marks the peak usage for thiobencarb, and subsequently the highest monitoring results.
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Thiobencarb monitoring starts at all five sampling sites tomorrow, April 28. We base the monitoring on planting and timing of thiobencarb applications with several counties receiving notices of intent to apply Abolish.
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The question frequently comes up if this is the last year for thiobencarb use in rice. The answer now is…maybe. For the first time since the CRC took over management from the Department of Pesticide Regulation (DPR) in 2003, the program received a conditional approval after eight exceedances of the performance goal in 2019.
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