- Posted by: Gale Perez
Congratulations to UC Davis weed science graduate student Erika Escalona (Fennimore Lab) for winning 1st place in the student poster presentation category at the 2024 California Plant and Soil Conference on Feb. 6-7, 2024 in Fresno, CA.
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Evaluating Bacterial Diversity in Steam Fumigation Treatments in the Salinas Valley's Lettuce Fields
Erika Escalona, University of California, Davis; Steve Fennimore, UC Cooperative Extension, Weed Specialist, Salinas; Department of Plant Sciences, University of California, Davis; J.S. Rachuy, Department of Plant Sciences, UC Davis; Cristina Lazcano, Department of Land, Air and...
- Author: Whitney B Brim-Deforest
- Author: Roberta Firoved
- Posted by: Gale Perez
California rice growers will have a new herbicide available this year: Cliffhanger™, manufactured by Gowan Company. The active ingredient is benzobicyclon, which is the same as one of the two active ingredients in the currently registered herbicide, Butte®. Cliffhanger™ is a soluble liquid formulation (SC) which can be applied by ground-rig or airplane, including as a direct-stream application into the water. In contrast, Butte® is a granular formulation, as a pre-formulated mixture of benzobicyclon and halosulfuron. To use either product, applicators must attend a training and be certified.
Dates for the training are posted on the California Rice Commission calendar
- Author: Aaron Becerra-Alvarez
- Author: Sarah Lorraine Marsh
- Author: Kassim Al-Khatib
- Posted by: Gale Perez
A new herbicide for early-season weed control in water-seeded rice will be available soon. The herbicide active ingredient (a.i.) is pyraclonil, which will be trademarked as Zembu™ (1.8% a.i.) by Nichino, America Inc. The mode of action is a protox porphyrinogen (PPO)-inhibitor or Group 14. This herbicide is formulated as a granule and will be used as a residual preemergence for application on the day of seeding onto flooded fields. The use rate is 14.9 lbs ac-1 applied by air. While this herbicide is not a new mode of action for water-seeded rice, it is a new mode of action for early-season residual weed control. Pyraclonil is widely used for weed control in paddy fields worldwide and is the most commonly utilized...
- Contributor: Drew Lyon
- Posted by: Gale Perez
Spring canola acreage in Eastern Washington has increased dramatically over the past five years. Much of this increase has been driven by the inability of growers to control multiple herbicide-resistant Italian ryegrass in other crops, such as wheat and pulse crops. A large percentage of the spring canola acreage is planted to glyphosate-resistant (Roundup Ready) varieties. Glyphosate has provided excellent control of Italian ryegrass in glyphosate-resistant spring canola. How long it will remain an effective herbicide for Italian ryegrass is an open question.
Over the past two years (2022 and 2023), we conducted field studies to evaluate the benefits of using herbicides with different...
- Author: Mick Canevari
- Author: Brent A Holtz
- Posted by: Gale Perez
The 2023 post-harvest season is upon us and it's time to prep for your fall/winter weed control activities. The long-range forecast is calling for another wet winter, and November is the ideal time to plan your early winter weed control program, to check that your spray equipment is functioning properly and calibrated, and to clean your orchard floor of nuts and debris.
There are a variety of herbicides available today for our tree and vine production systems. No one herbicide will control all the weeds present, but choices exist to achieve excellent control for almost every weed combination. However, it takes patience and persistence to win the weed war. Before programs are decided, the following key questions should be...
