- Author: Whitney Brim-DeForest
The 2019 Rice Weed Course will take place:
Friday, September 6, 2019
from 8:00AM to 4:10PM (Registration begins at 7:30AM)
at the
Hamilton Road Field (on West Hamilton Rd. between Hwy. 99 & Riceton Hwy.)
and Rice Experiment Station, Biggs, CA
This year will mark the third rice-specific weed course at the Hamilton Road Field and the Rice Experiment Station in Biggs, CA on Friday, Sept. 6, 2019. The day will begin with an interactive field tour of the research plots (Hamilton Road Field) where attendees can get up close to the weeds and rice (bring your boots!) The course will include a hands-on weed identification session on emerging and mature weeds. In the afternoon, speakers will address several pertinent topics in CA rice, including algae, weedy rice, regulatory update, best management for grasses, and how to construct a weed management program. This course is a great opportunity to interact directly with the UCCE and UC Davis Rice Weed Research Team!
For a full agenda and registration go to:
https://wric.ucdavis.edu/events/rice_weed_course_2019.html
For questions, please contact Whitney Brim-DeForest at 530-822-7515, or by email at wbrimdeforest@ucanr.edu
Credits for PCA, QAC, QAL, Private Applicator: 6.0 other, 0.5 laws
CA Certified Crop Adviser: 6.0 IPM
- Author: Whitney Brim-DeForest
2019 Annual Rice Grower Meetings
Sponsored by UC Cooperative Extension
-------------- 5 Locations --------------
WHERE & WHEN
Richvale: Thursday, Jan. 17, 8:30am, Evangelical Church, 5219 Church St., Richvale
Glenn: Thursday, Jan. 17, 1:30pm, Glenn Pheasant Hall, 1522 Hwy 45, south of Glenn
Colusa: Friday, Jan. 18, 8:30am, Colusa Casino Resort, 3770 Hwy 45, Colusa
Marysville: Friday, Jan 18, 1:30pm, Yuba County Government Center, 915 8th St. Marysville
Woodland: Tuesday, Jan. 22, 8:30am, Cracchiolo's Market, 1320 E. Main St. Woodland
TIME: Doors open at 8:00 am and meetings start at 8:30 am at Richvale, Colusa, and Woodland.
Doors open at 1:00 pm and meetings start at 1:30 pm at Glenn and Marysville.
Program
8:00 a.m. (1:00 p.m.) Doors open, sign‐in, coffee
8:30 a.m. (1:30 p.m.) Call meeting to order
California Rice Commission Referendum – Tim Johnson, CRC
8:50 a.m. (1:50 p.m.) Rice Research Board Nominations – Dana Dickey, Rice Research Board
9:00 a.m. (2:00 p.m.) Rice Pesticide and Regulatory Update – County Ag Commissioner
9:15 a.m. (2:15 p.m.) Weedy Rice and Emerging Weed Issues – Whitney Brim‐DeForest, UCCE
9:35 a.m. (2:35 p.m.) Arthropod and Disease Update – Luis Espino, UCCE
10:05 a.m. (3:05 p.m.) Season Review and Fertility Update – Bruce Linquist, UCCE
10:35 a.m. (3:35 p.m.) Weed Control Update – Kassim Al‐Khatib, UCCE
11:05 a.m. (4:05 p.m.) — ADJOURN —
****Applied for DPR and CCA CE credits****
- Author: Whitney Brim-DeForest
2018 Annual Rice Grower Meetings
Sponsored by UC Cooperative Extension
-------------- 5 Locations --------------
WHERE & WHEN
Woodland: Tuesday, Jan. 16, 1:30 pm, Cracchiolo's Market, 1320 E. Main St., Woodland
Richvale: Wednesday, Jan. 17, 8:30 am, Evangelical Church, 5219 Church St., Richvale
Glenn: Wednesday, Jan. 17, 1:30 pm, Glenn County Office of Ed, 311 South Villa Avenue, Willows
Colusa: Friday, Jan. 19, 8:30 am, Colusa Casino Resort, 3770 Hwy 45, Colusa
Yuba City: Friday, Jan. 19, 1:30 pm, Veterans Hall, 1425 Veterans Memorial Circle, Yuba City
TIME: Doors open at 8:00 am and meetings start at 8:30 am at Richvale and Colusa.
Doors open at 1:00 pm and meetings start at 1:30 pm at Woodland, Glenn and Yuba City.
Program
8:00 a.m. (1:00 p.m.) Doors open, sign-in, coffee
8:30 a.m. (1:30 p.m.) Call meeting to order
Rice Research Board Nominations – Dana Dickey, Rice Research Board
8:35 a.m. (1:35 p.m.) Rice Pesticide and Regulatory Update – County Ag Commissioner
8:50 a.m. (1:50 p.m.) Rice Seed Quality Assurance Program Update –
Timothy Blank, CA Crop Improvement Association
9:10 a.m. (2:10 p.m.) Variety Update - Kent McKenzie, RES
9:30 a.m. (2:30 p.m.) Season Review and Fertility Update – Bruce Linquist, UCCE
10:00 a.m. (3:00 p.m.) Weed Control Update – Kassim Al-Khatib, UCCE
10:30 a.m. (3:30 p.m.) Weedy Rice Update – Whitney Brim-DeForest, UCCE
10:50 a.m. (3:50 p.m.) Arthropod and Disease Update – Luis Espino, UCCE
11:10 a.m. (4:10 p.m.) — ADJOURN —
****Applied for DPR and CCA CE credits****
- 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 Harbinger system can be used in fields that are seeded by air. Both are viable uses of the chemical, and which one you choose will depend on your available equipment. For more information on how to apply, refer to the product labels.
Although I have used Prowl H2O in field trials and have a pretty good idea of its efficacy, I was curious to see how Harbinger looked in the field, since I have not yet had the opportunity to use it in a trial. I recently visited Rice Researchers, Inc., a rice breeding facility in Glenn County, where they are using a Harbinger-based program, for the second season. The photo (below) shows the rice at about 30 days after seeding. No weed species were present in the field. This is after one delayed pre-emergent Harbinger application.
It is too late to utilize pendimethalin this season, but for help incorporating pendimethalin into your herbicide plan for 2018, talk to your PCA, or give one of the UCCE Rice Advisors a call. Especially for growers that have herbicide resistant grasses, it can be a valuable tool in reducing grass populations.
- Author: Whitney Brim-DeForest
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 Station.
A new website, www.caweedyrice.com, contains all of the most up-to-date information regarding weedy rice in California. The website covers identification, management, and weedy rice sample submission.
An identification pamphlet was mailed out by the California Rice Commission a couple of weeks ago to most growers and PCAs. If you need additional pamphlets, they are available at your local UCCE office. Identification posters will be distributed to Agriculture Commissioner's offices, PCA offices, and rice mills and distributors in each county in the next few weeks. They are also available at your local UCCE office upon request.
To report an infestation of weedy rice, a new app is also available for download from the Google Play and ITunes stores.
The "Weedy Rice Reporter" app will let you send up to six pictures and aGPS location taken with your phone toUCCE RiceAdvisors so that we can confirm or rule out weedy rice. OnlyUCCE RiceAdvisors will be able to access any app submissions. We hope that the app will help us identify infestations early so that management actions can be implemented to eliminate weedy rice from the fields.