- Author: Whitney Brim-DeForest
- Posted by: Gale Perez
We talk about herbicide resistance all of the time in California rice, but how does it evolve in a field? Understanding how herbicide management selects for resistant populations is an important part of preventing the problem from occurring in your fields.
We have many weed species in CA rice that are confirmed to be herbicide resistant. The major herbicide-resistant species are late watergrass, early watergrass, barnyardgrass, smallflower umbrella sedge, ricefield bulrush (roughseed), sprangletop, and redstem. For this illustration of how herbicide resistance evolves in a field, we use redstem as our example.
Year 1, Beginning of season: A population of redstem is found in a...
- Author: Sarah Morran
- Posted by: Gale Perez
Weed management strategies in California are as diverse as the cropping systems grown in it, which cover over 400 commodities and $47 billion in revenue (California agricultural production statistics, 2015). A challenge for growers across the state is to respond to the continuing adaptation, invasion and spread of weeds in their cropping systems. Many factors contribute to the ability of a weed to adapt itself to changing environments, and one focus of research in the weed group at UC Davis includes investigating the contribution that genetic plasticity plays in plant adaptability. Many weed species, particularly grasses, contain multiple genomes (polyploidy). Some plants (and humans) contain a single genome, which means that one...
- Posted by: Gale Perez
From California Ag Today by Patrick Cavanaugh, Farm News Director :: Aug. 8, 2016
Vigilant Seed Bank Reduction: Whatever it takes, don't let weeds set seed.
By Patrick Cavanaugh, Farm News Director
For the past 15 years, Robert Norris, professor emeritus and vegetable crops weed specialist, UC Davis Department of Plant Sciences, has continued to attend Weed Day each year at UC Davis and to contribute weed photography for
/h3>- Author: Whitney Brim-DeForest
- Posted by: Gale Perez
First Annual
Rice Weed Course
Friday, September 16, 2016
Hamilton Road Field
(on West Hamilton Rd. between Hwy. 99 & Riceton Hwy.)
and Rice Experiment Station, Biggs, CA
Registration...
/h4>/h2>- Posted by: Gale Perez
If you didn't get a chance to meet Whitney Brim-DeForest at Weed Day 2016, here's a little background information on her (from the Rice Notes newsletter July, 2016):
Whitney Brim-DeForest is the newest addition to the UC Cooperative Extension Farm Advisor rice team. She will be based out of the Sutter-Yuba office, but will serve Placer and Sacramento counties as well. She holds a Ph.D. in Horticulture and Agronomy and an M.S. in.../span>