- Author: Carl E. Bell
- Re-posted by: Gale Perez
From the Invasive Plants in Southern California blog :: April 11, 2014
A few years ago it became apparent from conversations and emails that the use of Fusilade (fluazifop-P-butyl, manufactured by Syngenta Crop Protection), a herbicide that only kills grasses (Poaceae), was increasing among wildland weed warriors. It's a very useful herbicide and can play an important role in natural habitat restoration.
But was this use consistent with the label? Was it legal?
Well, not really. There are two Fusilade products on the market, Fusilade II and Fusilade DX. The Fusilade II label says right on the top of the label that it is, “For the...
- Author: Carl E. Bell
- Posted by: Gale Perez
From the Invasive Plants in Southern California blog :: June 11, 2014
Preemergence herbicides for wildland weed control
Kill weeds before they ever see the light of day; sounds great, doesn't it? That is what preemergence herbicides are for. They are a mainstay in commercial agriculture and ornamental landscapes, so why not in wildlands? While there are situations where they would be very helpful I have some concerns that make me reluctant to recommend them in general.
First of all, what is a preemergent herbicide? (The shorthand version is PREE, so I'll use that term for the rest of this blog.) These are...
- 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: Guy B Kyser
Joe DiTomaso and I are supposed to monitor the effectiveness of a hydrilla treatment in a pond near Marysville. I usually work on rangeland, where things stay put - the plants don't float away, and the equipment doesn't sink out of sight. How are we going to do this?
- Here are some rough dimensions of the pond. It is surrounded by dense stands of willow and cattail.
- We'll set T-posts at A, A', B, B', etc. so that we have as many permanent transects as we want. It's OK to set the posts on dry land, outside of the willows and cattail.
- When we're sampling, we run this cheap polypropylene rope (it floats) between A and A'. We have nylon twine tied at every 2 meters,...
- Posted by: David Low | WeedsNews
- Re-posted by: Gale Perez
- Author: James J Stapleton
Abstract: Solar tents, which are safe, inexpensive, and easy to construct, can be used to inactivate unwanted weed plant propagative materials, onsite. During two field trials in the San Joaquin Valley of California, from Sept 2 to 7, 2010, solar tents produced diurnal temperature maxima within closed sample bags of 63.5–76.7°C. The mean maximum temperatures within the sample bags were 32.9–42.1°C higher than those of ambient air, and temperatures greater-than or equal to 60°C were maintained for 3.2–6.0 h each afternoon during the field trials. Rhizome segments, excavated and excised from a local infestation of the important weed pest Sorghum halepense (johnsongrass), were used to evaluate effects of...