Armyworm Monitoring

2025 Armyworm Monitoring Update

Week of June 30

June 30

We are past the moth peak, which means that this week and next is when we will see peak worm activity. The peak is for the average in the Valley, but there are several fields where the moth counts are still increasing, meaning that there might be another week of worm activity.

In our scouting, we have found fields with heavy worm populations, but others where populations are low. Look for defoliation and worms. Rice can take quite a bit of defoliation, but if you are approaching 25%, a treatment may be needed.

Armyworm trap map and moth numbers per location

 

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