- Author: Lynn M. Sosnoskie
- Author: Stanley Culpepper
- Author: Ted Webster
Cover crops have been/are being used as organic mulches in crop production systems in order to increase soil organic matter, improve soil structure, conserve water and reduce erosion. Cover crops can also suppress weeds by serving as a physical barrier to seedling emergence, inhibiting seed germination via reduced light transmittance, through the release of allelopathic chemicals, and by preventing herbicide loss.
Attached is a video from the University of Georgia describing how to mange and roll rye (not ryegrass) for Palmer amaranth control in a cotton conservation-tillage system. Although much of the information (i.e. herbicide recommendations) may seem specific to the eastern coastal plain, the clip does provide a...
- 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 In contrast, a survey (unpublished) of 35 hairy fleabane populations in the same general...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...
