May 2019

Pyrethroid TMDL for 303(d) listed water bodies

Pyrethroid TMDL for 303(d) listed water bodies

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.

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2019 Armyworm Trapping

2019 Armyworm Trapping

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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Armyworm Monitoring is underway

Armyworm Monitoring is underway

Photo and article by Luis Espino, Rice Farming Systems Advisor, Butte and Glenn Counties

The armyworm monitoring season has started. The first traps were set on April 19, and two more sites were set up on April 30. More traps will be set up in the following weeks as growers finish their ground work and get ready for planting.

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