- Author: John A Roncoroni
- Posted by: Brad Hanson
Reposted with permission from the January 2014 issue of "CWSS Research Update and News", a semiannual publication by the California Weed Science Society. Check out that issue for several other interesting research and extension articles. Take care, Brad
Control of Willowherb in California's North Coast Vineyards
- John Roncoroni, UCCE Napa...
/span>- Posted by: Gale Perez
Here's an article by Paul Franson | Wines & Vines | 07.22.2014
Napa, Calif.—Last week John Roncoroni, a Napa County UC Cooperative Extension weed science advisor, held a field demonstration about the efficacy of herbicides newly registered for vineyard application. He had laid out 25 treatment plots and rated the herbicides for weed control in vineyards.
/span>- Author: Carl E. Bell
- Re-posted by: Gale Perez
From the Invasive Plants in Southern California blog :: Jan. 24, 2014
Tips on applying herbicides
The table below is from training that my colleagues Dr. Cheryl Wilen, Area Advisor, UC IPM; Dr. Milt McGiffen, Extension Specialist, UC Riverside; and I did in southern California at four locations in 2009/2010 with a total of 80 people that all had previous experience applying herbicides on invasive plants. This training utilized the 128th acre sprayer calibration method (more on that below).
- Author: Carl E. Bell
- Posted by: Gale Perez
Plant growth and development and herbicide efficacy, part 1
In the 1920's and 30's field bindweed (Convovulus arvensis) was a major weed in the western US; so much so that coordinated research was undertaken by the most prestigious Agricultural Universities from California to Oklahoma to figure out what to do. And this was before the advent of herbicides, so scientists and farmers had to rely on other methods, especially cultivation. After much work, it was discovered that the pernicious bindweed could be eradicated from a field by regular cultivation for just two seasons. They used duck-foot cultivators; a collection of several flat triangular blades that overlapped and ran horizontally about 2-4 inches below the...
/h4>- Author: Oleg Daugovish
- Posted by: Gale Perez
From the Topics in Subtropics blog :: July 5, 2013
It is not always easy to kill weeds with herbicides for several reasons, but if you apply the right material at the right time to susceptible weeds you expect control. But you should never assume it, because resistant weeds rely on this assumption.
Repeated use of herbicides with the same mode of action (usually the same target site within plant) selects for naturally occurring resistance traits in weed population. The few resistant weeds proliferate since there is no longer competition from susceptible types and if other control measures are not...