Armyworm

Armyworm Update Sept. 3

Armyworm Update Sept. 3

By Luis Espino, UCCE Rice Farming Systems Advisor

In all locations the number of moths trapped is coming down for the past two weeks of more. I have not been able to check fields for worms recently; I’m sure there are still a few worms out there. However, most of the rice is now past the point when panicles are at risk of significant injury. 

I have seen fields where armyworms caused injury (see pic below), but for the most part it has been small areas or not enough injury to justify an application. In some of the fields with more injury, I was asked what kind of yield reduction to expect.

Read more and see pics and graphs here: http://rice.ucanr.edu/Armyworm_traps/

More Armyworm Stories

Updating the Armyworm Fight

Updating the Armyworm Fight

By Luis Espino, UCCE Rice Farming Systems Advisor

By this time last year, we were seeing the peak of moth flight, with about 18 true armyworm moths per night, and almost no western yellostriped armyworm moths. This year, true armyworm moths are below 10 per night, except for a couple of locations in Glenn County. If we are going to experience an increase in flight, it might come in the next two weeks. 

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2019 Armyworm Trapping

2019 Armyworm Trapping

By Luis Espino, UCCE Rice Farming Systems Advisor

Looks like the number if moths we are catching is staying low, except for a couple of locations. By this time last year, we were averaging 18 moths per night, mostly all true armyworm. This year, we are not catching more than 10 per night, and in some cases the majority are western yellowstriped armyworm. I have not heard of heavy infestations on headed rice yet.

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