- Author: Marie Jasieniuk
Horseweed and hairy fleabane are closely related annual weeds that are widespread in Central Valley orchards and vineyards where many populations have evolved resistance to glyphosate. Interestingly, however, the geographic distribution of glyphosate resistance differs markedly between the two weeds.
A survey of 42 horseweed populations across the Central Valley in 2010 showed that glyphosate-resistant plants were abundant across the southern part of the Valley but that horseweed in the northern part of the Valley was still largely susceptible. In contrast, a survey (unpublished) of 35 hairy fleabane populations in the same general...
- Author: Gale Perez
At this week’s Monday Afternoon Weeders (MAW) meeting, Brad Hanson shared the following article from the Sacramento Bee: Stinkwort's fast growth could threaten California's wine growers
CBS picked up the story: Wine Country Growers Worried about Stinky Invasive Weed
Then there’s Jeannette Warnert’s blog post, Unwelcome weed 'stinkwort' spreading quickly in California.
Lastly, here is the
- Author: Jeannette E. Warnert
Stinkwort made its first California appearance in 1994, but remained quite rare...
- Author: Brad Hanson
A followup today on a post from last October about a series of glyphosate-resistant weed extension publications that were "about to be finalized". These four paper finally wound their way through the review and publication process and were posted on the UC ANR Catalog last week.
Brad
Selection pressure, shifting populations, and herbicide resistance and tolerance. Hanson, B., A. Fisher, A. Shrestha, M. Jasieniuk, E. Peachey, R. Boydston, T. Miller, K. Al-Khatib. 2013. University of California, Division of...
- Author: Brad Hanson
This is the last in my series of posts outlining current University of California weed science research published in the California Weed Science Society (CWSS) Research Update and News (June 2013, Volume 9, #2).
Lynn Sosnoskie (UC Davis, Weed Research Project Scientist) wrapped up some of her weed seed biology work from her previous position at the University of Georgia. ...