- Author: Whitney Brim-DeForest
- Author: Luis Espino
- Author: Troy Clark
- Posted by: Gale Perez
2020 Survey Update
Weedy rice was found in California on a large scale in 2016, over 8 counties, after having been only found in a few fields in one county prior to 2008. In 2020, University of California Cooperative Extension conducted a comprehensive survey. The objectives of this survey were to determine: 1) presence-absence of weedy rice, 2) to determine infestation level, and 3) to determine if there was any pattern to the distribution of weedy rice biotypes.
A survey was conducted from June thru September 2020 across eight counties (Glenn, Butte, Colusa, Sutter, Yolo, Yuba, Placer and Sacramento). Each field was surveyed on an individual basin level. Each basin was surveyed by...
- Author: Whitney Brim-DeForest
Watergrass
We are having more and more difficulties controlling watergrass over the past 20 or so years. We know that as of the early 2000s, we had found multiple-herbicide resistant late watergrass (also known as mimic), as well as multiple-herbicide resistant barnyardgrass. For early watergrass, we now have resistant biotypes (to thiobencarb), with none recorded as being multiple-herbicide resistant.
In 2017, two rice fields were identified with an unknown watergrass biotype (or species) that looked very different than the three main known species that infest California rice fields (late watergrass, early watergrass, and barnyardgrass). Both fields had...
- Author: Todd Fitchette
- Posted by: Gale Perez
From Western FarmPress
The UC is suggesting practices that could help control spread of the wild rice type.
Written by Todd Fitchette | Apr 20, 2021
California rice growers with troublesome patches of weedy rice, or red rice, may want to...
- Author: Whitney Brim-DeForest
- Posted by: Gale Perez
Weedy Rice Workshop
Thursday, August 1, 2019
10:00 AM- 12:00 noon (followed by lunch)
Colusa Casino Chairman's Room
This event is FREE, but you must register. Click HERE to register.
Limited to 50 participants, so please enroll early. Seats will be filled on a first-come basis.
Find out the in-depth updates on the latest research on weedy rice in California. This is an opportunity for growers and PCAs to ask questions and discuss the progress of managing this pest.
Agenda
| 9:30 | Doors open, sign... |
- Author: Jeannette E. Warnert
- Posted by: Gale Perez
The $1 million UC Cooperative Extension Presidential Chair for California Grown Rice has been awarded to Whitney Brim-DeForest, UCCE rice advisor for Sutter, Yuba, Placer, Sacramento and Butte counties.
Brim-DeForest said she will use the funds generated from the endowed chair to hire a full-time technician to monitor a research study at UC Davis on weedy rice. Weedy rice is the same species as cultivated rice and it produces rice, however the grain falls off the plant before harvest.
She is part of a team of UC scientists that includes UCCE advisors Luis Espino and Michelle...
