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.
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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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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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Here is the latest update from UCCE Rice Farming Systems Advisor Luis Espino on the armyworm front.
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By Luis Espino, UCCE Rice Farming Systems Advisor
For the last two weeks the number of true armyworm moths has declined, indicating that at this point there should be very little egg laying going on. In a couple of locations on the west and south part of the valley the number of western yellowstriped armyworm moths has increased. In the past, I have not seen western yellowstriped armyworm be a problem, I have only seen a few worms of this species in rice this year. Just in case, I’m providing graphs with total number of moths (the graphs on the left) and separated by species (on the right).
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From Luis Espino, UCCE Rice Farming Systems Advisor
Here’s a link to this week’s update on the armyworm from in the Sacramento Valley.
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From Luis Espino UCCE Rice Farming Systems Advisor
The number of moths trapped continues to increase. We are finding numerous medium sized worms, maybe second, third, and fourth instars in fields where moth counts are above 30 per night. Worms have moved from levees and borders to basins. This is the time to scout and look closely for defoliation in the upcoming two weeks.
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From Luis Espino UCCE Rice Farming Systems Advisor
The number of true armyworm moths has shot up quite a bit in several locations. True armyworm has been the problem species in the past. Western yellowstriped armyworm moths have been variable, increasing in some locations, decreasing in others, but in general, the numbers are much lower than at the beginning of the season.
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The Intrepid® 2F Insecticide (EPA Reg. No. 62719-442) section 18 has been approved for use in Butte, Colusa, Glenn, Merced, Sacramento, San Joaquin, Sutter, Yolo, Yuba Counties.
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UCCE Rice Farm Advisor Luis Espino reports in this week’s update that true armyworm numbers are on the rise.
Here’s a link to Luis’ update, including trapping data and the latest on the western yellowstriped armyworm.
