- Posted By: Brad Hanson
- Written by: Reposted from WSSA
I ran across a Weed Science Society of America (WSSA) press release from last summer that I found interesting.
The article, entitled "The Deadly Problem of Poisonous Weeds", outlines ten poisonous weeds in North America that are particularly dangerous and features information from UC Davis Cooperative Extension Weed Specialist Joe DiTomaso.
The article includes basic information on the toxicity, identification, and links to photos of::
1. Poison hemlock
2. Waterhemlocks
3. Oleander
4. Bittersweet nightshade
5. Common pokeweed or pokeberry
6....
- Posted By: John A Roncoroni
- Written by: John Roncoroni
Field Bindweed (Convolvulus arvensis)
The late spring rains that fell in Northern California seemed to benefit some plants more than others. One weed that appears to be doing very well this year is Field bindweed. Field bindweed (Convolvulus arvensis), is a perennial weed that spreads by seed, creeping roots and rhizomes. You may call it morningglory or wire weed. It has arrow-shaped leaves and white to pink trumpet-shaped flowers and can grow spread along the ground from early spring until late fall. Bindweed’s creeping roots can penetrate the soil to more than 10 feet and send up vertical shoots that look much like seedlings, but unlike seedlings, are part of a much larger plant. Studies...
- Posted By: Brad Hanson
- Written by: Smith, Roncoroni, Blodget, Blankinship, Tjosvold, Fennimore
This week we are finalizing plans for the 55th Annual UC Davis Weed Day on July 14th. It's not too late to register if you are interested in a sampling of the current weed science research at UCD! More info and registration information on Weed Day can be found here: http://wric.ucdavis.edu/events/weed_day_2011.htm
We've been busy this getting the agenda finished, spraying a few last herbicide treatments, and working out the many logistic details (thanks Gale P. for her focus on logistics!). I was thinking about what (and when) I'd post on the blog this week and, voila, the California Weed Science Society...
- Posted By: Brad Hanson
- Written by: WSSA press release
After an extended cool and wet spring, we are finally getting summer-like weather in most of the Central Valley. If your garden and home landscape are like mine, now is the time of the year where the winter weeds are winding down and the summer weeds are coming in to take their places. I thought this would be a good time to re-post this article from the Weed Science Society of America
The article discusses some integrated weed management lessons that homeowners can learn from farmers and can found at: http://www.wssa.net/WSSA/PressRoom/WSSA_Stewardship.htm and is also attached at...
- Author: Lars Anderson
Since the early 1980s, the California Department of Boating and Waterways (BWW) has been increasingly successful in managing two invasive aquatic weeds in the Sacrament-San Joaquin Delta: water hyacinth (Eichhornia crassipes) and Brazilian waterweed (Egeria densa). Now, over the past few years, a new threat has emerged: South American Spongeplant (Limnobium laevigatum). A native of South America, Central America and Central Mexico (as the name implies), this is a prolific, floating, flowering plant in the “frogbit” family (Hydrocharitaceae).
Spongeplant infestations were first found in 2003 in small ponds in Redding and Arcata, CA, but more was discovered in the San Joaquin River by CDFA and...