- Author: Ian Grettenberger
- Author: Luis Espino
Want to help make sure your freshly planted rice fields don't look like the muddied mess on the left below (vs. clear on right) following a pyrethroid application? Wondering if your tadpole shrimp are becoming less susceptible to pyrethroids? We do too! Pyrethroids are widely used for managing resistance and resistance seems to be a growing issue.
We are looking for additional fields where we can sample tadpole shrimp to test for pyrethroid resistance. We will be gathering soil/shrimp and then using these samples to run laboratory bioassays and measure susceptibility. The goal is to start measuring precisely how susceptible populations are in different fields. This will help us determine precisely how resistant known resistant populations are, how prevalent low levels of resistance are, and how “susceptible” currently susceptible populations are to generate baseline data. This will help generate the long-term baseline data we need to stay on top of this issue. We will anonymize any publicly available data. In addition, we hope that by measuring resistance in individual fields, we can help you by noting any susceptibility slippage that may not have shown up yet in terms of control. We can also help address questions about whether lack of control is due to resistance or application issues.
Types of fields:
- Fields with known resistance to pyrethroids in tadpole shrimp (control issues).
- Suspect fields where you think resistance is an issue, but it is a just a hunch or a concern.
- Any other field. Even if pyrethroids have been working well, it is still good to know susceptibility levels and for us to generate baseline data.
What we need:
- Access to field(s)
- Summary of your ability to manage tadpole shrimp with pyrethroids, any declines in susceptibility, etc.
If you are interested please email or call (Ian) at imgrettenberger@ucdavis.edu or 530-752-0473.
- Author: Luis Espino
WHERE & WHEN
Richvale: Monday, Jan. 13, 8:30am, Evangelical Church, 5219 Church St., Richvale
Willows: Monday, Jan. 13, 1:30pm, Glenn County Office of Education, 311 South Villa Avenue, Willows
Colusa: Tuesday, Jan. 14, 8:30 am, Colusa Casino Resort, 3770 Hwy 45, Colusa
Yuba City: Tuesday, Jan. 14, 1:30 pm, Veterans Hall, 1425 Veterans Memorial Circle, Yuba City
Woodland: Wednesday, Jan. 15, 1:30 pm, Norton Hall, 70 Cottonwood St, Woodland
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 Glenn, Yuba City and Woodland.
PROGRAM
8:00 am (1:00 pm) Doors open, signâin, coffee
8:30 am (1:30 pm) Call meeting to order - Rice Research Board Nominations – Dana Dickey, Rice Research Board
8:35 am (1:35 pm) California Rice Commission Referendum – Tim Johnson, California Rice Commission
8:50 am (1:50 pm) Drinking Water Well Requirement – Roberta Firoved, California Rice Commission
9:00 am (2:00 pm) Rice Pesticide and Regulatory Update – County Ag Commissioner
9:15 am (2:15 pm) Variety Update – Kent McKenzie, Rice Experiment Station
9:30 am (2:30 pm) Weedy Rice – Whitney Brim-DeForest, UCCE
9:45 am (2:45 pm) Disease Management – Luis Espino, UCCE
10:00 am (3:00 pm) Arthropod Management – Ian Grettenberger, UCCE
10:15 am (3:15 pm) Year in Review and Yield Contest – Bruce Linquist, UCCE
10:30 am (3:30 pm) Fertility – Bruce Linquist, UCCE
10:45 am (3:45 pm) Weed Management – Kassim AlKhatib, UCCE
11:15 am (4:15 pm) Evaluation
11:30 am (4:30 pm) — ADJOURN —
****Applied for DPR and CCA CE credits****
2020 UCCE Rice Grower Meetings
- Author: Whitney Brim-DeForest
The impetus behind the weed survey is due to the increasing numbers of new weed species that have appeared in the past several years: winged primrose-willow, weedy rice, monochoria, and recently, one (possibly two) new watergrass species. We are hoping that by conducting a survey, we may find some new species before they spread, and better establish ranges for the species we know we have.
A crew of two people will be stopping in random fields in the major rice-producing counties. We will take soil samples from the top six inches of soil in each field. The soil samples will then be processed in a greenhouse at UC Davis, where the weeds will be grown out to identify each species present in the soil. The reason we are surveying this way, instead of surveying during the rice-growing season, is due to the use of herbicides during the season, we would have difficulty seeing the presence of weed species that are well-controlled by the herbicides.
- Author: Whitney Brim-DeForest
Webinar - U.S. Rice: The Sustainability Powerhouse
An American Society of Agronomy webinar sponsored by The Rice Foundation and USDA Natural Resources Conservation Service.
Date: Wednesday, October 16, 2019
Time: 12:00 Noon Eastern/11:00 AM Central/9:00 AM Pacific
Description: The U.S. rice industry's commitment to sustainability dates back generations, long before the word “sustainability” became a popular, if difficult to define, term. In this webinar, you'll hear from U.S. rice farmers on why preserving resources and providing habitat is important to them, and why end users are making investments around the implementation of more sustainable practices.
Speakers:
Jennifer James, Farmer and Chairwoman USA Rice Sustainability Committee
Bill Jones, Rice Agronomy Manager, Anheuser-Busch
Paul Buttner, Manager of Environmental Affairs, California Rice Commission
George Dunklin, Owner, Manager Five Oaks Lodge and Past President Ducks Unlimited
Access information
Register for the webinar here: https://www.agronomy.org/education/classroom/classes/738
You do not have to be a certified crop advisor or professional agronomist to sign up for the webinar. If you do not already have an account with the agronomy societies you will have to create an account here. Once you create an account and are registered, you should receive an email from GoToWebinar with a link to access the webinar. If you have trouble creating an account or registering for the webinar, please contact Lydia Holmes
CEUs:
CCA/CPAg: 1.0 Sustainability
CPSS/CPSC/CST: 1.0 Professional Meetings
- Author: Luis Espino
UC Cooperative Extension is conducting a survey of rice diseases this fall. The objective of the survey is to document the incidence of rice diseases in Sacramento Valley rice fields so that the Air Resources Board agrees to continue to allow the rice industry to burn up to 25% of the acreage. Every five years, the Board has to re-approve the straw burning program. One of the reasons for letting growers still burn is disease control. Therefore, it is important to show that diseases are still present in rice fields.
A crew of four to five will be stopping in random fields in the major rice producing counties and inspecting for the presence of diseases in 30 sites in each field. We will look for stem rot, aggregate sheath spot, kernel smut, and blast. The precise location of each field won't be disclosed, only the general location and County. So far, we have inspected 10 fields in Butte County, and have found very low levels of blast and kernel smut. Stem rot and aggregate sheath spot are more variable; we have found fields with very little of these diseases and fields with a lot.
