- Author: Steven Fennimore
Dear Weed Managers
Wednesday Feb. 15 of this week the Weed Science Society of America (WSSA) hosted a 4 hour listening session at the Tulare UCCE office conference room. In attendance were growers, consultants, ag industry personnel and university extension personnel. The WSSA is hosting 7 of these sessions around the US, the Tulare session was for the Southwestern US. The consensus was that people were aware of the difficulties that growers in the southeastern US were having with herbicide resistant weeds, but that outside of rice, herbicide resistant weeds in California are of concern but not a major problem. Worries about labor shortages, costs and regulations were of greater concern for California weed...
- Author: Brad Hanson
A few weeks ago, we announced the California leg of a series of six national workshops to discuss herbicide resistant weeds.
We're finalizing the list of invitees for the meeting in Tulare on February 15th. This is during the World Ag Expo, and right across the street from the Expo grounds so it's a convenient two-fer for anyone interested in both events. There are still a few participant slots left - here are three links if you're interested:
1. Original post about the series of workshops sponsored by the Weed Science Society of America:
- Author: Brad Hanson
Requesting growers and ag industry members to contribute to the national conversation on herbicide-resistant weeds
As part of a national effort on developing research and regulatory priorities related to the challenging problems of herbicide-resistant weeds, the Weed Science Society of America is sponsoring a series of half-day regional workshops to discuss the issues, potential solutions, and technical and economic barriers related to resistant weeds.
To date, much of the conversation about herbicide resistance at the national level has been dominated by the large acreage row crops of the Midwest, East, and South. These cropping systems, particularly the glyphosate-based...
From the Topics in Subtropics blog ∴ June 15, 2016
Researchers have now confirmed that six glyphosate-resistant weed species have been identified in California. Four have been known to exist for some time; they are horseweed (marestail, Conyza spp.), hairy fleabane, rigid ryegrass and annual ryegrass. To that list, junglerice and Palmer amaranth in the Central Valley have been recently added to the list. Additional weeds that have become more of a challenge to control and are on the suspect list are goosegrass and, in the central San Joaquin Valley, the summer grasses sprangletop and witchgrass.
There have never been a lot of...
- Author: Sarah Morran
- Posted by: Gale Perez
Each of us have the entire blueprint for our bodies contained in every cell, and the same is true of plants. This information is stored in the form of an extremely long molecule known as DNA (in human cells its length is ~6 feet). Studying and understanding DNA in plants has led to many advances in weed science including; the development of herbicide- tolerant crop varieties, understanding the causes of herbicide resistance and understanding the origins and spread of weeds in our environment.
Here in California, the weed science group at UC Davis is utilizing this technology to investigate glyphosate resistance that has been detected in California populations of junglerice. Junglerice is a summer grass weed present in many...