UC Rice Blog

Date: August 14, 2024 Location: Corner of Tule Rd & Lodi Rd, Colusa, CA (3900'44.3"N 12155'54.

We have had some interesting calls lately concerning issues we do not usually see in the fields. We have received calls about small circular areas with snipped rice in fields west of I-5.

I have been hearing rumbles about grasshoppers in the Valley, mostly in grasslands. I visited a rice field last week with high grasshopper populations. Most of the grasshoppers were near field borders at a density of about 2-3 per square yard in the most dense areas.

Last year was a blast year. I first saw leaf lesions in some fields right about heading time. In other fields there were no leaf lesions, but neck blast developed later.

At our last meeting, we had some questions about the approved uses of pendimethalin in California rice. There are several products labeled for use on rice with pendimethalin as the active ingredient. As of June 2024, pendimethalin registered products (on rice) include Prowl H2O, Prowl 3.