UC Rice Blog

I am resending this blog which is similar to one sent out a few weeks ago. I am looking at the current and extended weather forecast, and seeing low nighttime temperatures forecast for the last half of July. This is especially the case for the southern part of the Sacramento Valley. The data I am looking at…

Watergrass (Echinochloa spp.) is the most competitive weed complex in California rice production. These plants can emerge under both continuously flooded and flushed conditions, often resulting in significant yield losses—up to 100% in dry- or drill-seeded systems, and about 50% in water-seeded systems, when…

As the crop starts advancing towards heading, one concern is blast. So far I have not seen any leaf blast. Blast spores need free moisture on the leaves to germinate and infect. Leaf wetness is a good measure of free moisture. Typically, leaf wetness increases during the evening and stays high until early…

We regret to inform you that the Rice Production Workshop originally scheduled for July 23–24, 2025 has been cancelled due to unforeseen circumstances.If you have already paid the registration fee, we’ll be refunding your payment in full. The process is currently underway. If you have any questions regarding…

Time to round up the usual suspects! When talking about arthropod control in California, the usual suspects are rice seed midge, tadpole shrimp, and armyworms. I will focus on rice seed midge and tadpole shrimp in light of recent pyrethroid exceedances detected in the Sacramento Valley. The challenge…