- Author: Luis Espino
Moth catches have come down considerably. Looks like the worst of the infestation has passed. There are still worms out in the field; keep an eye on late planted rice.
- Author: Whitney Brim-DeForest
August 9, 9:00 am-12:00 pm
New Earth Market Harvest Room
1475 Tharp Road, Yuba City
August 10, 9:00 am - 12:00 pm
Colusa Casino
3770 Hwy 45, Colusa
In the workshops, UCCE will give updates on the current weedy rice situation and research being conducted in California. Dr. Nilda Burgos, from University of Arkansas, will give a presentation on how Southern US rice producers have dealt with this weed.
REGISTER: rice.ucanr.edu/Weedy_Rice_Workshops
There is no cost to attend but on-line registration is required. Enrollment per workshop is limited to 50 people, so please enroll early. Lunch is included.
The workshops are sponsored by the University of California Cooperative Extension and the California Rice Comission.
**CADPR and CCA CE hours are pending**
- Author: Luis Espino
We are seeing severe armyworm infestations in the field. Moth numbers have stayed relatively constant in a few locations, still on the increase in Sutter and Yolo counties. This means that egg laying may continue and we may have more worms coming up.
I have gotten several reports of pyrethroids not controlling worms. Dimilin (diflubenzuron) has been working well. However, remember that Dimilin has an 80 day pre-harvest interval. Intrepid (methoxyfenozide) received a Secion 18 today and can now be used.
The infestation is not over yet, so don't stop scouting. If you detect small worms, consider a treatment. Armyworms get their name form the fact that they move "like an army", in large numbers all at once. Worms may move from areas with severe infestations to unaffected areas of the field.
Here's a few of the pics I have received from several areas of Colusa, Glenn and Butte counties.
- Author: Whitney Brim-DeForest
It may be a bit early in the season to start thinking about herbicide resistance, but in just a couple of weeks, most rice growers will have put out their last herbicide applications, and it will be time to start scouting.
University of California Cooperative Extension, in collaboration with the Agronomy Research and Information Center at UC Davis, has produced a short video which explains how to collect seed to make sure that if you do submit weed seed for testing, you get back accurate results. The form which must accompany any submitted weed seeds can be found on the UCANR Rice Website: http://rice.ucanr.edu/files/263785.pdf.
- 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.
