- Author: Bruce Linquist
During the January UCCE Rice Winter Grower meetings I asked the audience a number of questions related to how they managed rice in 2019 when they planted during or after the mid to late May rains. As you recall, 2019 May rainfall was one of the highest on record with almost 3 inches falling between mid to late May (see Figure below showing average May rainfall from three CIMIS stations (Durham, Colusa and Davis). Thanks to all of you who participated. We had roughly 140 people respond. About 50% of farmers reported planting their last field by May 25; however, almost 40% of respondents said their last rice field was planted after June 1. These June plantings were more common on fields located east of the Sacramento River as most farmers were able to get their fields in earlier on the west side. Over 80% of the respondents said that in fields planted after the rains, yields were down by up to 10 sacks/ac; while 15% said they were the same. Also, about 25% of farmers reported that grain quality was lower in the late planted fields.
The management area that most farmers said was most challenging was land preparation (37%), followed by weed management (23%), stand establishment (13%) and nutrient management (10%). With respect to weeds, 32% said weed control was similar to other years. For farmers reporting that it was more challenging, most reported that grasses (44%) were the most difficult to control, followed by sedges (18%) and broadleaves (6%). About 50% of farmers reported that the efficacy of their herbicides was worse than normal. Both Kassim and Whitney felt that these two results are not surprising. The grass weeds were able to take advantage of the rains and germinate earlier than the rice making them more difficult to control. Furthermore, granular herbicide efficacy may also have been affected by deeper than normal flooding depth (diluting herbicides) at the beginning of the season, if rains came soon after planting.
Many reported land preparation to be very challenging. About one third of farmers reported that in late planted fields they skipped one or more tillage passes; while 12% skipped rolling. About 80% reported applying aqua-ammonia, although 20% of farmers had to apply aqua to wet soil, while 60% applied to dry soil and may have had to do some extra tillage passes to encourage soil drying. That leaves 20% of farmers that used granular fertilizers for their total N requirement. How these fertilizers were applied (before or after planting) was mixed. This is an area that I will be looking at more this year in an effort to develop better strategies to apply granular fertilizer when aqua is not an option.
Finally, and not necessarily related to the wet year, M-206 remained the most popular medium grain variety overall. It was the main variety planted for 48% of respondents and was grown widely in all regions of the Sacramento Valley. M-209 was the second most popular variety and most widely grown on the west side-particularly in Glenn and Colusa counties. The variety M-105 was planted mostly in Butte County where it was the main variety for over 50% of the respondents in that area. Interestingly, M-105 was not planted as much in the southern part of the valley where it yields well and heads relatively early. Talking with some growers, while they like the yields, they feel M-105 may be more prone to lodging than M-206 which delays harvest.
If you missed the rice grower meeting this year, the presentations can be seen at http://rice.ucanr.edu/Presentations/Winter_Grower_Meetings/.
- 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 firstname.lastname@example.org 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.
8:00 am (1:00 pm) Doors open, sign‐in, 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****
- 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.
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
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
CCA/CPAg: 1.0 Sustainability
CPSS/CPSC/CST: 1.0 Professional Meetings