The weekly update from UCCE Rice Farming Systems Advisor Luis Espino indicates a growing armyworm population in the Sacramento Valley. Here’s his update:
Number of moths in traps has increased significantly, mostly in Butte and Glenn counties. Number of worms in fields we are monitoring is still very low, but could increase in the upcoming two weeks. Now is the time to increase monitoring, especially in rice planted in late May that may be heading now.
According to the University of California Cooperative Extension (UCCE) latest Armyworm Monitoring Update, moth numbers continue to increase in most locations throughout the Sacramento Valley.
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You must have the Intrepid® 2F supplemental label in hand as if it were on the container. Intrepid® 2F is the only product with the active ingredient methoxyfenozide registered for use to control armyworm on rice. The registration was complete earlier this year, which left the registrant (Corteva Agriscience) no time to include rice on the label. Corteva Agriscience has made the supplemental label available on the CDMS and Agrian websites. For permitting and label questions, please contact your local agricultural commissioner’s office.
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The University of California Cooperative Extension (UCCE) has started the first checks of the season for armyworms throughout the Sacramento Valley.
According to the UCCE, traps will be set up at all 15 monitoring sites that have been used in prior years. Below is a map of those locations-
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