- Author: Brad Hanson
A quick post today with information about MSMA herbicides. There has been concern and lack of certainty about the registration status of MSMA and other organic arsenical herbicides. I was forwarded the attached press release and current labels for MSMA 6.6 and MSMA 6 Plus.
For those that may not know, MSMA (monosodium acid methanearsonate)is a product used in cotton, golf courses and sod farms, and rights of way.
The red text below is copied from the attached press release.
February 20, 2013
- Author: Douglas J Munier
Glyphosate resistant ryegrass has been a persistent problem since appearing in almond orchards in the Sacramento Valley in the late 1990’s. It is a winter annual weed, but under irrigation it can germinate any time of the year. This year round germination pattern wasn’t noticeable in the Sacramento Valley when it was effectively controlled by glyphosate. Summer and early fall germinating ryegrass plants are particularly difficult to control at the typical November to December herbicide timings because they are larger established plants at the time of application.
Pre-emergence herbicides are a good way to deal with this extended germination period. June/July pre-emergence herbicide treatments...
- Author: Richard Smith
Weed control in onions can be challenging. Onions have various challenges that make weed control difficult. They grow slowly early in the crop cycle and never achieve a good competitive crop canopy to suppress weeds. Also, given the high density plantings, it is not possible to effectively cultivate the beds. In addition, given the close spacing between plants, it is difficult to hoe out weeds without risking damage to the onion stand. In conventional onion production there are a number of materials that can provide excellent weed control (see Figure 1). The timing of application of the materials can be tricky because some weeds may grow quickly and be difficult to control by the time the onions reach the 2nd...
- Author: Lynn M. Sosnoskie
- Author: Ted Webster
- Author: Stanley Culpepper
Palmer amaranth is a highly competitive weed of field corn, peanut, soybean and, especially, cotton. Biotypes resistant to glyphosate have been confirmed throughout the SE USA; in 2012, glyphosate-resistance in Palmer amaranth is suspected to occur in the Southern San Joaquin Valley here in California.
Herbicide resistance can develop de novo in plant populations via spontaneous genetic mutation, meiotic recombination and transposable element activity. Herbicide resistance can also be acquired via gene-flow, which is achieved through the movement of seeds and pollen. For species like Palmer...
- Author: Gale Perez
EVENT ANNOUNCEMENT
University of California Allium Workgroup & California Garlic and Onion Research Advisory Board bring you the latest research results for Growers and Allied Industry
California Garlic and Onion Symposium 2013
Monday, February 11, 2013
UC Cooperative Extension, Tulare County
Agriculture Building Auditorium (4437 S. Laspina Street, Tulare, CA)
(Directly across the street from the World AG Expo)
For more information, see attached flyer
