- Author: Elise S Gornish
Many researchers have attempted to identify the magic combination of elements needed to control the cover and spread of Medusahead (Taeniatherum caput-medusae), an invasive winter annual grass. Individually, these attempts have yielded a variety of outcomes that sometimes suggest opposing strategies for effective weed control. Recently, researchers at UC Cooperative Extension and UC Davis attempted to leverage the collective value of these disparate investigations. They conducted a systematic review in order to understand if any broad conclusions could be drawn to highlight effective techniques for weed management. The authors found that short-term control of Medusahead can be achieved by using most combinations of burning,...
- Author: Carl E. Bell
- Posted by: Gale Perez
Carl Bell
Emeritus, University of California, San Diego, CA
carl@socalinvasives.com
The intentional manipulation of wild plants to become desirable crops was the beginning of agriculture some 10,000 years ago. Along with this beginning came weeds; unwanted plants that prospered in the same human-created environments. Weeds are therefore just as much a part of our domestic culture as the crops. So the history of weed control technology is co-existent with the history of agricultural technology. If you search the internet for the history of agriculture, you will find lots of information. If, however, you search the internet for the history of weeds, you will be disappointed by the lack of literature and...
- Author: Tunyalee Martin
It's that time of year when volatile organic compound (VOC) emissions released from nonfumigant pesticide applications can impair air quality. Regulations are in effect that growers and pest control advisers should know about, especially for the San Joaquin Valley starting May 1.
Here are highlights from Pam Wofford, Department of Pesticide Regulation (DPR), regarding the San Joaquin Valley. Pest control advisers cannot recommend and growers cannot use:
- high-VOC products containing abamectin, chlorpyrifos, gibberellins, or oxyfluorfen
- between May 1 and October 31, 2015 and again for May – Oct. 2016
- for
- Author: Chris McDonald
County Location: Imperial County
Date Posted: April 2, 2015
Closing Date: May 15, 2015
Job Information: http://ucanr.edu/jobFiles/765.pdf
http://ucanr.edu/Jobs/Jobs_990/?jobnum=765
We seek a Research and Extension Center Director to lead an integrated Research and Extension program at the Desert Research and Extension Center (Desert REC). This position has administrative and programmatic responsibilities in applied research and extension in vegetable crops.
Specific...
- Author: Sonia Rios
- Author: Travis Bean
- Author: Kurt Hembree
Citrus integrated pest management (IPM) programs typically utilize a combination of control practices, like cultural, mechanical, and chemical, to minimize competitive effects of weeds on crop productivity. Weed management can be an expensive part of the total citrus production program, but resources invested here can provide significant economic returns.
Tree age and variety considerations
The smaller canopies of younger trees allow more light to reach orchard floor, promoting greater weed growth, which can lower yield by 23-33% compared to mature groves (Singh and Sharma 2008). Sensitivity of citrus trees to the various registered herbicides varies, depending partly on tree age. While mature trees...