Armyworm

Armyworm Numbers on the rise

Armyworm Numbers on the rise

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.

graph of average moth captures in sacramento valley for the past 4 months

Armyworm monitoring website

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Highest Armyworm Numbers Expected Soon and Inspection Tips

Highest Armyworm Numbers Expected Soon and Inspection Tips

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.

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