Here’s the weekly armyworm update from UCCE Rice Farm Advisor, Luis Espino:
Week of August 17
Number of moths in traps has come down in some locations and have come up in others. There seems to be quite a bit of variability. We are finding more worms in fields, but the numbers are not high. In some fields there is some panicle injury, but not enough to be of economic significance.
Late planted fields where panicles are still green could be injured. If you see blanked panicle branches, confirm it is armyworm injury. Blast can also blank panicle branches; branches injured by armyworm will hang down from the panicle, while branches affected by blast will remain pointing upwards.