- Author: WSSA
- re-poster: Brad Hanson
A quick repost this morning on the upcoming meeting of the Aquatic Plant Management Society. Invasive aquatic weeds are a huge problem in some river, canal, and lake/pond systems in California and around the world. Management of aquatic weeds on a large scale is complicated by: complex ownership and management of water ways, limited mechanical and chemical control options, and aggressive plant biology.
The aquatic plant management society has an annual conference to discuss current research and the state of the art when it comes to manage these challenging plants. Click here for...
- Author: Brad Hanson
We received several calls yesterday from a news organization in San Francisco about a CDFA biocontrol program for an invasive aquatic weed, water hyacinth.
I'm a terrestrial weed guy who works mostly in orchards and vineyards, not aquatics so I kept a low profile. However, I think biocontrol of invasive weeds is really interesting and decided to share two links about the program. This from KTVU Channel 2 in San Francisco: http://www.ktvu.com/news/28704763/detail.html and here is the official Press Release on the CDFA program:
- 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...
- 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...
- Author: John A Roncoroni
Pacific Mosquitofern, (Azolla filculoides) often referred to as Azolla, is native to California. It is considered a desirable component of natural habitats and an important food source for waterfowl. Azolla is a floating aquatic fern that spreads by stem fragments and spores. Azolla as being up to 5cm (2 inches) long, but can be as small as ¼ to ½ inches.
Azolla is often misidentified as duckweed (Lemna spp), another common small floating aquatic plant. Azolla is initially green, like duckweed, but soon turns a red or brown color. This coloration is caused by...