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.
With favorable weather forecast, there should not be issues with maintaining the waterholding requirements and managing drift over the drains.
All monitoring results have been excellent with the upper Colusa Basin Drain site at the performance goal of 1.5 µg/L on May 12.
A specialized workshop for Delta rice growers aimed at demonstrating a new water recirculation tool is set for later this month. According to those behind the new project, the pumps help reduce water and energy use.
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The California Rice Commission collects data on pyrethroids and toxicity in water and sediments at our four main agricultural drain sites in accordance with the Basin Plan Amendment Total Maximum Daily Loads (TMDL) requirements under the Clean Water Act. Pyrethroids (i.e., Warrior, Lambda-cy, Silencer) are used in rice production to manage insects.
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The Rice Pesticide Program (RPP) will enter the 8th week of thiobencarb (i.e., Bolero, Abolish, Willowood Thio) monitoring on June 27. The results of monitoring across the sampling sites have generally yielded positive results with only two samples exceeding the performance goal of 1.5 μg/L to date.
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