- Author: Angelica Reddy
- Posted by: Guy B Kyser
Exotic water primroses (Ludwigia spp.) are aggressive invaders in both aquatic and riparian ecosystems. The plants form dense mats over the water surface. These mats constrain navigation and interfere with recreational activities, irrigation, drainage, and agricultural production. Rapid growth of these weeds also displace native plants and wildlife in aquatic ecosystems.
In the US, several exotic Ludwigia taxa have naturalized and become invasive: Ludwigia hexapetala, L. peploides subsp. peploides, L. peploides subsp. montevidensis, and L. grandiflora. Stakeholders are eager to get these weeds under control by all means necessary and one option is...
Reposted from the UCANR Sacramento Valley Field Crops blog
Mechanical cultivation is a useful tool in controlling herbicide-resistant Italian ryegrass individuals in a rainfed wheat system but is only about half as effective as Axial in reducing overall pressure from Italian ryegrass (expressed as a percentage of total groundcover). Growers should consider multiple approaches (chemical and mechanical) and integrate IPM strategies to reduce the spread of resistance among...
A new species of gigantic tumbleweed once predicted to go extinct is not only here to stay -- it's likely to expand its territory.
The species, Salsola ryanii, is significantly larger than either of its parent plants, which can grow up to 6 feet tall. A new study from UC Riverside supports the theory that the new tumbleweed grows more vigorously because it is a hybrid with doubled pairs of its parents' chromosomes.
Findings from the study are detailed in a new paper published in the Oxford University-produced journal AoB...
The U.S. Department of State and the J. William Fulbright Foreign Scholarship Board are pleased to announce that Steven Fennimore of the University of California, Davis, has received a Fulbright U.S. Scholar Program award to work in Uruguay in agriculture. Fennimore will conduct research and teaching at the INIA Las Brujas horticultural field station as part of a project to develop sustainable weed management systems in specialty crops.
Fennimore is a faculty member in the
- Author: Chris McDonald
As the summer heat is finally nearing its end, and its officially fall on the calendar, there unfortunately is a new crop of weeds flowering right now. Some of our summer annuls have started to go to seed, others are just about ready, and others are already starting to senesce. In order to manage these weeds, managers must stop the plants from reproducing. With our summer annuals that means stopping the plants from producing seeds, right about now, (or maybe three weeks ago).
However, treating a giant tumbleweed right now isn't really my favorite activity. I'd rather spend my time treating small tumbleweeds and working more effectively and also using less labor and/or herbicides to do it in the process....