Armyworm

2019 Armyworm Trapping

2019 Armyworm Trapping

Article by Luis Espino, Rice Farming Systems Advisor, Butte and Glenn Counties

The first set of traps were set up on April 19, and more traps are being set up as fields get ready for planting. So far, seven sites have been set up.

As you know, there are two species of armyworms that are found in rice, the true armyworm and the western yellowstriped armyworm.

Surprisingly, western yellowstriped armyworm numbers have been very high in the three sites monitored so far. In the past two years of monitoring, very few of these moths were found this early. We usually get these high numbers at the peak of armyworm flight in late June. True armyworm numbers are low, as expected. I am not sure what the high number of western yellowstriped armyworm means, but it might be a good idea to keep an eye to see what happens in other crops around the rice area.

http://rice.ucanr.edu/armyworm_traps/

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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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