Armyworm

Armyworm numbers rising

Armyworm numbers rising

This week’s armyworm update from UCCE Rice Advisor Luis Espino indicates a spike in the number of moths caught in pheromone traps at several locations. This means it’s important for growers to closely monitor their fields.

In areas with armyworms, moths are flying, mating and laying eggs. Under this scenario, large larvae could be present in about two weeks. Larvae feed on rice panicles and cause broken branches with blank kernels.

Click here for the latest information on the armyworm, including when treatment is recommended.

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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