The armyworm monitoring network started a few weeks ago. We have traps on 15 sites across the Sacramento Valley and three sites in the northern San Joaquin Valley. Moth numbers are starting to increase mostly in the northern part of the Sacramento Valley, and small worms have been found at very low densities (see pic below).
The armyworm moth numbers are updated weekly on our armyworm website. This year, we are using AgPestMonitor to show the trap catches per location. On the map, click on a location of interest and a graph showing the number of moths trapped will show up below the map. No registration is required.
To receive a weekly email with a brief description of the armyworm situation and a link to the moth numbers once they are updated, you can subscribe here.
Armyworm larva size found on 18 June 2021, Glenn County.