The University of California Cooperative Extension (UCCE) says the next several days will be critical for growers to monitor their fields, and potentially make any necessary treatment decisions, as armyworm numbers will be at their highest very soon.
As expected, moth numbers peaked last week. Utilizing annual trend data and on-site monitoring, the UCCE says worms in the field will peak this week and next.
UCCE suggests growers look for defoliation and recommend inspecting plants at the water level, paying close attention to areas with thick stands and look for worms hiding between tillers.
For more armyworm information and to sign up for weekly updates from the UCCE click here.