- Author: Whitney Brim-DeForest
In 2017, I started getting reports of a watergrass biotype/species (Echinochloa spp.) that was difficult to control using our suite of herbicides registered in rice. At the time, I knew we had multiple herbicide-resistance in late watergrass (Echinochloa phyllopogon), so I initially just thought the resistant biotype was spreading, and had maybe gained resistance to additional herbicide modes of action. However, once I started visiting fields, it quickly became apparent that this was not late watergrass (phenotypically-speaking). It also did not appear to be barnyardgrass (Echinochloa crus-galli), although the Echinochloa species are notoriously difficult to identify, and phenotypically quite variable in...
- Author: C. Scott Stoddard
- Posted by: Gale Perez
Scott Stoddard, University of California Cooperative Extension (Merced County) Farm Advisor, takes a look at weeds in a corn field, cotton field and a ditch in the Dos Palos area. He discusses cultural management, biological management and possible benefits of weeds.
- Author: Valerie Eviner
- Posted by: Gale Perez
Valerie Eviner is a Professor of Ecosystem Management and Restoration in the Department of Plant Sciences at UC Davis.
Himalayan blackberry can be a persistent weed, particularly in riparian settings. A number of conventional herbicide treatments are effective in its control, but in many settings, there is pressure to decrease the use of conventional herbicides and find alternative control methods. To assess whether the organic herbicide ADIOS (sodium chloride) could provide blackberry control, we collaborated with Putah Creek Riparian Reserve to implement the following treatments:
- No spray control
- Conventional...
- Author: Valerie Eviner
- Posted by: Gale Perez
Valerie Eviner is a Professor of Ecosystem Management and Restoration in the Department of Plant Sciences at UC Davis.
Yellow starthistle is a noxious weed common in many areas of California's grasslands, and is often a priority for control, due to its effects on decreased livestock carrying capacity, decreased plant diversity, and interference with recreational uses (reviewed in DiTomaso et al. 2006). A number of conventional herbicides are highly effective in controlling yellow starthistle (DiTomaso et al. 2006, USFS 2014), but in many settings, there is increased pressure to decrease use of conventional herbicides and find alternative control...
- Author: Brad Hanson
"A Virtual Conference to Discuss Real-World Weeds".
That's a great tag-line for the California Weed Science Society conference and a sign of the times.
Even though our in-person interactions as weed researchers, managers, and regulators has been put on hold this year, weed control goes on and so does the need for the education and updates provided by the CWSS.
Please remember to register for the conference this year to keep up your education and training and get the latest information as well as supporting YOUR California Weed Science Society. The program committee has put together another...
