Soruce:http://www.foodsecurityportal.org/commodities Accessed on 12 Aug 2020
Aug 18$0.43 +2.4 % Sep 18$0.43 0 % Oct 18$0.43 0 % Nov 18$0.42 -2.3 % Dec 18$0.43 +2.4 % Jan 19$0.43 0 % Feb 19$0.43 0 % Mar 19$0.42 -2.3 % Apr 19$0.43 +2.4 % May 19$0.43 0 % Jun 19$0.44 +2.3 % Jul 19$0.43 -2.3 % |
Collecting Watergrass Seed: Field Submissions Needed!
The project was funded by the California Rice Research Board, and is led by Whitney Brim-DeForest (UCCE Sutter-Yuba) and Marie Jasieniuk (UC Davis).
We are reaching out to ask for locations of rice fields from growers and PCA's, so our team can go out and collect seed. We are looking for all types of watergrass: "mimic", early watergrass, late watergrass, barnyardgrass (Figure 1), and the new species that we started seeing a couple of years ago (Figure 2). We hope to start collecting in the next week or two, through the end of September.
For more information, and if you are interested in having us come out and sample your field(s), please contact Whitney Brim-DeForest (wbrimdeforest@ucanr.edu), or call 530-822-7515.
UCANR: Safeguarding abundant and healthy food for all Californians
The period between panicle initiation (PI) and heading is critical with respect to grain formation. During this time, cold temperatures can result in pollen sterility as the plants go through meiosis. Pollen sterility results in blanking. Nighttime temperatures below 58 oF can result in sterility. The Figure shows the relationship between average low temperatures during booting and statewide yields. Data are from 1992 to 2018. The data represent the average low temperature for a 15-day period beginning about one week after panicle initiation to one week before heading.
Varietal selection is important to minimize blanking. Varieties such as M105 and M206 are more cold tolerant than M209, for example. However, all varieties can be negatively affected by cold temperatures during this period. One way to help minimize the damage is to raise the flood water height in the field during this time to 6-8 inches (or more). The water acts as a blanket and protects the emerging panicle from cold temperatures.
This sensitive period during booting usually occurs in July. For rice planted in mid-May, the critical period is the last two weeks of July. I realize as I write this that it may already be a bit late for many growers. However, I am looking at the forecast and seeing nighttime temperatures in the mid-50s over the next few days in areas south of highway 20.
If you are a grower or PCA with a field that has had an infestation in the past, we will be reaching out to you to let you know when we will be visiting.
A big thank you to the California Rice Commission for providing the funding for this survey. For more information about weedy rice in California, visit caweedyrice.com.
For questions regarding the survey, feel free to reach out to Luis Espino (laespino@ucanr.edu), Whitney Brim-DeForest (wbrimdeforest@ucanr.edu), or Michelle Leinfelder-Miles (mmleinfeldermiles@ucanr.edu).
This field day is open to the public. Please share broadly to those who may be interested in attending.
UCANR California Rice Virtual Field Day
When: August 26, 2020, 1:00-3:00 PM
Where: Online Zoom Webinar
Host: Whitney Brim DeForest, UC ANR County Director, Sutter-Yuba Counties and CE Rice and Wild Rice Advisor
Registration: $20.00
Objectives/goals: The UC Cooperative Extension and California Rice Research Station will update attendees in the areas of variety development, disease and arthropod management, weed control, weedy rice, and fertility.
The full agenda can be viewed here.
Who should attend: California rice growers, Pest Control Advisers, and others interested in California rice production systems.
Continuing education units: Applied for 1 CEU from the California Department of Pesticide Regulation (DPR) and applied for 1 CEU from Certified Crop Adviser (CCA)
Featured speakers:
Contacts for more information:
This field day is open to the public. Please share broadly to those who may be interested in attending.
THIS EVENT WILL BE RECORDED FOR EDUCATIONAL OR PROMOTIONAL USE BY THE UNIVERSITY OF CALIFORNIA. CONTACT THE ORGANIZERS OF THIS EVENT FOR MORE INFORMATION.https://ucanr.edu/blogs/blogcore/postdetail.cfm?postnum=43265
