- Reposted by: Gale Perez
- Author: Carl E. Bell
Onionweed (Asphodelus fistulosus) is an attractive but very difficult to control weed that is relatively common along highways, some irrigation right of ways and other areas in Southern California. It likely came to our area as an ornamental plant, maybe as part of a seed mix or used (I was told) in reclamation projects in the north county area of San Diego. Once you learn to recognize it, it is easy to spot in spring and summer, especially along interstate 5 from La Jolla and on north at least as far as San Luis Obispo County. Photo 2 is from a restoration site in San Diego...
- Author: Carl E. Bell
- Re-posted by: Gale Perez
My title is Regional Advisor – Invasive Plants, but I really think of myself as a Weed Scientist (which sometimes gets an interesting response from some people; those that likely have a smoking habit).
Weed is a simple word; everyone knows the word and has an idea of what it is referring to, right? It’s a plant that someone doesn’t like for some reason. Or perhaps it is a plant existing somewhere it doesn’t belong. The definition that the Weed Science Society of America (yes there really is a Weed Science Society of America, and no they do not do research on “WEED”) uses is, “any plant that is objectionable or...
- Author: Carl E. Bell
- Reposted by: Gale Perez
Reposted (with permission) from the UC ANR blog Invasive Plants in Southern California
Link to original post (December 6, 2013): Medusahead in San Diego County written by Carl Bell
Medusahead [Elymus (Taeniatherum) caput-medusae] is a relatively new but serious invasive grass in San Diego County. So far it is only known from infestations in the Santa Ysabel, west...
- Author: Gale Perez
Carl Bell, University of California Cooperative Extension Regional Advisor on Invasive Plants, created a new blog on invasive plants in southern California. Here's a look at the blog:
- Author: Guy B Kyser
After making a bunch of extension presentations, and following our 2012 publication of “Preemergent control of medusahead on California annual rangelands with aminopyralid” (Rangeland Ecology & Management 65:418-425), I’ve talked with quite a few ranchers who have successfully used Milestone® preemergence at 7 to 14 oz/acre to control medusahead. (See this blog post.) I should note here that 7 oz of Milestone is the maximum broadcast rate; 14 oz is labelled only for spot treatments.
Recently, Matt Rinella (USDA-ARS, Montana) found that aminopyralid controls seed set in medusahead in the greenhouse. He previously demonstrated this effect for...
