- Author: Gale Perez
UC Rice Advisor Whitney Brim De-Forest is using a spray chamber to apply a foliar organic fertiliser to rice. She uses the chamber to make sure that they are applying a precise amount of the product.
Thanks to @balde.hamady for the video!
https://www.facebook.com/whitbd/videos/10101651706972791/
- Author: Whitney Brim-DeForest
Over the past year and a half, I have been conducting research and extension with weedy (red) rice (Oryza sativa L.), which has re-emerged as a pest in California rice fields. What makes this plant so interesting is that it is the exact same species as cultivated rice (also Oryza sativa L.). This means that it is edible (fit for human consumption), not subject to quarantine (not regulated at the state or federal level), and difficult to distinguish from cultivated rice in the field, since it looks a lot like the cultivated rice varieties. It is, however, considered a pest, due to its impact on yield and processing quality.
Because it is rice, and it is edible, my colleagues and I have had to do a lot of...
- Author: Whitney Brim-DeForest
- Author: Luis Espino
- Author: Timothy Blank
- Author: Teresa DeLeon
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From the UC Rice Blog...
The 2017 season kicked off with much fanfare regarding weedy rice. Thanks to the vigilance of the entire rice industry, the UCCE Rice Advisors received many calls regarding weedy rice, starting in late June, as growers finished their herbicide applications. Calls continued to come in through July and August. The California Crop Improvement Association (CCIA) began inspecting fields as the rice headed, and suspected plants were pulled and sent to the UCCE Weedy Rice Team for genetic testing.
By the end of the season, we had a total of:
- 53 samples submitted for...
- Author: Whitney Brim-DeForest
As many of you are aware, many of our grass species in California rice are resistant to multiple herbicides. Late watergrass aka "mimic" (Echinochloa phyllopogon), early watergrass (E. oryzoides) and barnyardgrass (E. crus-galli) are among some of our most competitive weed species, causing large yield reductions when uncontrolled.
One of the last remaining chemicals that our grass species are not yet resistant to is pendimethalin. Commercial formulations for pendimethalin registered for California rice are Prowl H2O and Harbinger. Prowl H2O is a delayed pre-emergent herbicide applied onto dry, drill-seeded fields. Harbinger is also a delayed pre-emergent herbicide, but the...
- Author: Whitney Brim-DeForest
- Posted by: Gale Perez
Over the past year, weedy rice has become a top issue in California rice, both for individual growers and for the industry as a whole. Working together, the University of California Cooperative Extension and the California Rice Commission have come up with a set of tools to assist in getting control of this pest. Of course, none of it would be possible without the input and cooperation of the Pest Control Advisers (PCAs) and California rice growers, who are the first line of defense in dealing with weedy rice. Additional assistance in material development and funding have come from the California Rice Research Board, the California Crop Improvement Association and the staff at the California Rice Experiment...