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Thiobencarb exceeded the 1.5 µg/L (parts per million) performance goal to a reading of 2.3 µg/L at the Colusa Basin Drain 5 (CBD5) site off Highway 20. A monitoring site receiving drainage from Colusa and Glenn Counties. This particular exceedance was at the second monitoring event on May 14.
Pyrethroid insecticides have been under scrutiny for several years resulting in recent changes to water quality requirements. The changes set monitoring levels for pyrethroids at nanograms in surface waters. Consistent exceedances of the levels could result in additional restrictions to pyrethroid use, or designate a drain as impaired with future restoration to correct the water quality. Last year, one of the water quality coalitions had a detection that could be problematic under the new standards.
Article by Luis Espino, Rice Farming Systems Advisor, Butte and Glenn Counties
Ten sites have been set up so far, mostly on the west side of the valley where planting has moved a bit quicker than in the rest of the valley.
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Article by Luis Espino, Rice Farming Systems Advisor, Butte and Glenn Counties
The first set of traps were set up on April 19, and more traps are being set up as fields get ready for planting. So far, seven sites have been set up.
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WDR
Farm Bill
Conservation
