June 2019

Thiobencarb Results improving

Thiobencarb Results improving

Thiobencarb monitoring was off to a rough start with nine exceedances of the 1.5 µg/L (parts per billion) performance goal in the agricultural drains. The performance goal, established in 1991, is set in the Central Valley Water Board Basin Plan. Our concern was the exceedances began the second week of monitoring rather than the typical mid-season timing coordinating with Memorial Day. 

READ MORE
Armyworm Numbers rising

Armyworm Numbers rising

From Luis Espino UCCE Rice Farming Systems Advisor

The number of moths trapped continues to increase. We are finding numerous medium sized worms, maybe second, third, and fourth instars in fields where moth counts are above 30 per night. Worms have moved from levees and borders to basins. This is the time to scout and look closely for defoliation in the upcoming two weeks.

READ MORE

Thiobencarb Monitoring continues to exceed

The Cal/EPA leadership is taking a higher interest in reviewing programs as a result in the change in the State and Agency Administrations. Compliance with thiobencarb permit conditions are under scrutiny and could result in changes to future use of this important herbicide. The monitoring results are our measure of compliance with the thiobencarb permit conditions

READ MORE
2019 Armyworm Trapping Update

2019 Armyworm Trapping Update

From Luis Espino UCCE Rice Farming Systems Advisor

The number of true armyworm moths has shot up quite a bit in several locations. True armyworm has been the problem species in the past. Western yellowstriped armyworm moths have been variable, increasing in some locations, decreasing in others, but in general, the numbers are much lower than at the beginning of the season.

READ MORE

Thiobencarb Monitoring Moves to Fifth and Sixth Weeks

Thiobencarb monitoring results report numbers at most sites on May 30 and June 4. The monitoring numbers exceeded the 1.5 µg/L (parts per billion) performance goal at the upper part of Colusa Basin Drain (CBD5) on May 30, and the lower part of the drainage (CBD1) May 30 and June 4. This now counts as seven exceedances of the performance goal into the sixth week of monitoring.

READ MORE

Thiobencarb Fourth Week of Monitoring

Memorial Day weekend typically marks the fifth week of thiobencarb monitoring with peak use and numbers exceeding the 1.5 µg/L (parts per million) performance goal. For this atypical year, the holiday marked the fourth week of monitoring with numbers at all sites except the Sacramento River location. The monitoring results recovered to acceptable levels after a rough start where the performance goal was exceeded two and three weeks into the program.

READ MORE