http://ucanr.org/sites/wric3/index4.cfm?blogrss=32026&utm_source=RSS&utm_medium=RSS&utm_campaign=RSS%2BFeed UC Davis Weed Science Blog en-us UC ANR http://cyber.law.harvard.edu/rss/ Fri, 24 May 2013 21:00:24 PST Fri, 24 May 2013 21:00:24 PST UC ANR Below is an article from The Weed's News. [TriplePundit 15 May 2013 by Tina Casey] -- Chicago’s Department of Aviation announced that O’Hare International Airport is getting its own herd of goats to help manage vegetation, so even though the pilot project hasn’t even gotten off the ground yet it’s already a whopping success.​ That’s because, although the airport does expect to realize some concrete bottom line benefits from goat-powered landscaping, one goal of......
]]> Wed, 22 May 2013 10:26:16 PST http://ucanr.edu/blogs/blogcore/postdetail.cfm?postnum=10442&utm_source=RSS&utm_medium=RSS&utm_campaign=RSS%2BFeed gperez@ucdavis.edu(Gale Perez) http://ucanr.edu/blogs/blogcore/postdetail.cfm?postnum=10442 Here's an article from the UCCE San Joaquin County Field Notes newsletter (May 2013.) Medusahead has been invading our rangelands for years. The Natural Resource Conservation Service (NRCS) has photo documentation from the early 1980’s with large stands of medusahead on the east side of the county. Medusahead can also be found in the Livermore area but until this spring I have never seen it on San Joaquin County’s west side. It is a very invasive grass that can potentially reduce......
]]> Tue, 14 May 2013 11:04:50 PST http://ucanr.edu/blogs/blogcore/postdetail.cfm?postnum=10382&utm_source=RSS&utm_medium=RSS&utm_campaign=RSS%2BFeed gperez@ucdavis.edu(Gale Perez) http://ucanr.edu/blogs/blogcore/postdetail.cfm?postnum=10382 Seeing yellow these days? As in…those brightly-blooming yellow-flowering shrubs along roads and hillsides from the Bay Area to the Sierra Nevada foothills. Broom—French, Spanish, and Scotch—is in full spring bloom, even at higher elevations. Spanish broom, Spartium junceum (also known as Genista juncea), is a heat-loving, deciduous, flowering shrub with yellow, pea-like flowers in the family Fabaceae. Originally used as a landscape shrub, it has escaped into wild lands and......
]]> Sun, 12 May 2013 22:32:56 PST http://ucanr.edu/blogs/blogcore/postdetail.cfm?postnum=10374&utm_source=RSS&utm_medium=RSS&utm_campaign=RSS%2BFeed rmillercripps@ucanr.edu(Rebecca Miller-Cripps) http://ucanr.edu/blogs/blogcore/postdetail.cfm?postnum=10374 Tue, 07 May 2013 10:03:48 PST http://ucanr.edu/blogs/blogcore/postdetail.cfm?postnum=10332&utm_source=RSS&utm_medium=RSS&utm_campaign=RSS%2BFeed rgwilson@ucanr.edu(Rob Wilson) http://ucanr.edu/blogs/blogcore/postdetail.cfm?postnum=10332 Glyphosate-resistant (GR) Palmer amaranth is, currently, the most significant weedy pest of cotton grown in the SE US. In order to reduce population size, maximize herbicide efficacy and prevent the development of further resistances, cotton growers must consider using additional mechanical (i.e. tillage) and cultural (i.e. cover crops) weed management strategies. Small plot experiments conducted in Georgia between 2008 and 2010 showed that the use of deep-tillage plus a heavy rye cover crop,......
]]> Fri, 03 May 2013 16:56:42 PST http://ucanr.edu/blogs/blogcore/postdetail.cfm?postnum=10319&utm_source=RSS&utm_medium=RSS&utm_campaign=RSS%2BFeed lmsosnoskie@ucdavis.edu(Lynn Sosnoskie) http://ucanr.edu/blogs/blogcore/postdetail.cfm?postnum=10319 Fri, 03 May 2013 11:37:00 PST http://ucanr.edu/blogs/blogcore/postdetail.cfm?postnum=10320&utm_source=RSS&utm_medium=RSS&utm_campaign=RSS%2BFeed gperez@ucdavis.edu(Gale Perez) http://ucanr.edu/blogs/blogcore/postdetail.cfm?postnum=10320 Since it was first identified in 2004, glyphosate-resistant Palmer amaranth has become the most significant weedy pest of cotton in the Southeastern United States. When acceptable control is not realized, and Palmer amaranth is allowed to set seed, population densities can become quite high in infested fields. For example, research conducted by the University of Georgia indicated that Palmer amaranth seed densities exceeded 35,000 seeds per m2 in a cotton field where the glyphosate-resistant......
]]> Wed, 01 May 2013 15:16:59 PST http://ucanr.edu/blogs/blogcore/postdetail.cfm?postnum=10297&utm_source=RSS&utm_medium=RSS&utm_campaign=RSS%2BFeed lmsosnoskie@ucdavis.edu(Lynn Sosnoskie) http://ucanr.edu/blogs/blogcore/postdetail.cfm?postnum=10297 Wed, 01 May 2013 11:42:37 PST http://ucanr.edu/blogs/blogcore/postdetail.cfm?postnum=10296&utm_source=RSS&utm_medium=RSS&utm_campaign=RSS%2BFeed lmsosnoskie@ucdavis.edu(Lynn Sosnoskie) http://ucanr.edu/blogs/blogcore/postdetail.cfm?postnum=10296 Fri, 26 Apr 2013 14:44:24 PST http://ucanr.edu/blogs/blogcore/postdetail.cfm?postnum=10263&utm_source=RSS&utm_medium=RSS&utm_campaign=RSS%2BFeed bhanson@ucdavis.edu(Brad Hanson) http://ucanr.edu/blogs/blogcore/postdetail.cfm?postnum=10263 Wed, 24 Apr 2013 12:38:22 PST http://ucanr.edu/blogs/blogcore/postdetail.cfm?postnum=10235&utm_source=RSS&utm_medium=RSS&utm_campaign=RSS%2BFeed bhanson@ucdavis.edu(Brad Hanson) http://ucanr.edu/blogs/blogcore/postdetail.cfm?postnum=10235 Mon, 22 Apr 2013 15:07:41 PST http://ucanr.edu/blogs/blogcore/postdetail.cfm?postnum=9853&utm_source=RSS&utm_medium=RSS&utm_campaign=RSS%2BFeed cjmcdonald@ucanr.edu(Chris McDonald) http://ucanr.edu/blogs/blogcore/postdetail.cfm?postnum=9853 The newest issue of the journal "California Agriculture" (April-June 2013) published by the University of California and UC Division of Agriculture and Natural Resources just came out and has two articles written by UC weed researchers Check out the whole issue here or the specific articles at the links below. For switchgrass cultivated as biofuel in California, invasiveness limited by several stepsby Joseph M. DiTomaso, Jacob N. Barney, J. Jeremiah Mann, and Guy Kyser......
]]> Tue, 16 Apr 2013 17:01:45 PST http://ucanr.edu/blogs/blogcore/postdetail.cfm?postnum=9767&utm_source=RSS&utm_medium=RSS&utm_campaign=RSS%2BFeed bhanson@ucdavis.edu(Brad Hanson) http://ucanr.edu/blogs/blogcore/postdetail.cfm?postnum=9767 In ailanthus territory, you have to be careful not to park for too long in one place....
]]> Tue, 16 Apr 2013 09:00:39 PST http://ucanr.edu/blogs/blogcore/postdetail.cfm?postnum=9759&utm_source=RSS&utm_medium=RSS&utm_campaign=RSS%2BFeed gbkyser@ucdavis.edu(Guy Kyser) http://ucanr.edu/blogs/blogcore/postdetail.cfm?postnum=9759 This is a new-to-me weed, even though it's growing all around Robbins Hall where I've been working since typewriter times. Fumitory (Fumaria spp.) is a lacy, vine-like annual native to Europe. Looks sort of like parsley, though it's not related. It doesn't have tendrils, but it has 'grabby' foliage, and it drapes over other plants and fences by coiling its stem ends. Fumitory is in the poppy family (Papaveraceae). Its flowers are small, white to purplish, and bilateral in axillary racemes. I......
]]> Mon, 15 Apr 2013 10:24:03 PST http://ucanr.edu/blogs/blogcore/postdetail.cfm?postnum=9748&utm_source=RSS&utm_medium=RSS&utm_campaign=RSS%2BFeed gbkyser@ucdavis.edu(Guy Kyser) http://ucanr.edu/blogs/blogcore/postdetail.cfm?postnum=9748 I wanted to share a link today to a paper published by CAST, the Council for Agricultural Science and Technology. This paper, entitled "Herbicide-resistant weeds threaten soil conservation gains: finding a balance for soil and farm sustainablity", was released about a year ago and addresses one of the less obvious issues resistance imposes - soil erosion. This paper can be viewed or downloaded (free!) at the link above. The development and adoption of effective postemergence herbicides, both......
]]> Fri, 12 Apr 2013 14:04:13 PST http://ucanr.edu/blogs/blogcore/postdetail.cfm?postnum=9741&utm_source=RSS&utm_medium=RSS&utm_campaign=RSS%2BFeed bhanson@ucdavis.edu(Brad Hanson) http://ucanr.edu/blogs/blogcore/postdetail.cfm?postnum=9741 Cilantro was produced on 5,543 acres in Monterey and Ventura Counties in 2011. The production of cilantro has shifted to high density 80-inch wide beds and a large proportion is now mechanically harvested. Hand weeding high density beds is very expensive and reduces the economic viability of this crop. As a result, there is a need for excellent weed control. Two broadleaf herbicides were registered on cilantro: Prefar and Caparol. Prefar was registered for a number of years and provides good......
]]> Mon, 08 Apr 2013 09:00:59 PST http://ucanr.edu/blogs/blogcore/postdetail.cfm?postnum=9721&utm_source=RSS&utm_medium=RSS&utm_campaign=RSS%2BFeed gperez@ucdavis.edu(Gale Perez) http://ucanr.edu/blogs/blogcore/postdetail.cfm?postnum=9721 Fri, 05 Apr 2013 08:43:56 PST http://ucanr.edu/blogs/blogcore/postdetail.cfm?postnum=9700&utm_source=RSS&utm_medium=RSS&utm_campaign=RSS%2BFeed bhanson@ucdavis.edu(Brad Hanson) http://ucanr.edu/blogs/blogcore/postdetail.cfm?postnum=9700 A quick post today to share a link to the recently revised "UC IPM Pest Management Guidelines for Kiwifruit" (UC ANR Publication #3449). You can download the whole document as a pdf here, or use it online at the above link. Although there are also well-written sections on general kiwi pest management, as well as specific information on insects, mites, and diseases of kiwifruit, since this is the Weed Science blog, I'd better post a link directly to the Integrated Weed Management section......
]]> Thu, 04 Apr 2013 18:05:50 PST http://ucanr.edu/blogs/blogcore/postdetail.cfm?postnum=9698&utm_source=RSS&utm_medium=RSS&utm_campaign=RSS%2BFeed bhanson@ucdavis.edu(Brad Hanson) http://ucanr.edu/blogs/blogcore/postdetail.cfm?postnum=9698 Mon, 01 Apr 2013 14:59:25 PST http://ucanr.edu/blogs/blogcore/postdetail.cfm?postnum=9660&utm_source=RSS&utm_medium=RSS&utm_campaign=RSS%2BFeed jaroncoroni@ucanr.edu(John Roncoroni) http://ucanr.edu/blogs/blogcore/postdetail.cfm?postnum=9660 Thu, 28 Mar 2013 12:10:30 PST http://ucanr.edu/blogs/blogcore/postdetail.cfm?postnum=9643&utm_source=RSS&utm_medium=RSS&utm_campaign=RSS%2BFeed bhanson@ucdavis.edu(Brad Hanson) http://ucanr.edu/blogs/blogcore/postdetail.cfm?postnum=9643 Mon, 25 Mar 2013 11:57:01 PST http://ucanr.edu/blogs/blogcore/postdetail.cfm?postnum=9603&utm_source=RSS&utm_medium=RSS&utm_campaign=RSS%2BFeed cawilen@ucanr.edu(Cheryl Wilen) http://ucanr.edu/blogs/blogcore/postdetail.cfm?postnum=9603 Wed, 20 Mar 2013 15:52:48 PST http://ucanr.edu/blogs/blogcore/postdetail.cfm?postnum=9569&utm_source=RSS&utm_medium=RSS&utm_campaign=RSS%2BFeed bhanson@ucdavis.edu(Brad Hanson) http://ucanr.edu/blogs/blogcore/postdetail.cfm?postnum=9569 Wed, 20 Mar 2013 14:45:21 PST http://ucanr.edu/blogs/blogcore/postdetail.cfm?postnum=9568&utm_source=RSS&utm_medium=RSS&utm_campaign=RSS%2BFeed bhanson@ucdavis.edu(Brad Hanson) http://ucanr.edu/blogs/blogcore/postdetail.cfm?postnum=9568 Dr. Tom Lanini was made a Fellow of the Western Society of Weed Science (WSWS) in March 2013 at the annual meeting in San Diego. Tom is a Cooperative Extension Weed Ecologist in the Department of Plant Sciences at the University of California, Davis. He spent the first three years of his career at Penn State University and the subsequent 27 years UC Davis. Tom has provided significant service to the WSWS by serving on numerous committees. He has been very active in WSWS for more than 24 years.......
]]> Wed, 20 Mar 2013 09:20:27 PST http://ucanr.edu/blogs/blogcore/postdetail.cfm?postnum=9559&utm_source=RSS&utm_medium=RSS&utm_campaign=RSS%2BFeed gperez@ucdavis.edu(Gale Perez) http://ucanr.edu/blogs/blogcore/postdetail.cfm?postnum=9559 Sahara mustard, a resilient weed native to North Africa and the Mediterranean, is invading desert landscapes in the American Southwest, squeezing out beautiful wildflower displays that attract tourists and maintain the local ecology, reported the San Diego Union Tribune. UC Cooperative Extension is testing methods of removing Sahara mustard, including hand weeding, hoes and herbicide. But these are only stopgap measures meant to keep the plant at bay in select spots. “I don’t......
]]> Tue, 19 Mar 2013 07:17:15 PST http://ucanr.edu/blogs/blogcore/postdetail.cfm?postnum=9554&utm_source=RSS&utm_medium=RSS&utm_campaign=RSS%2BFeed gperez@ucdavis.edu(Gale Perez) http://ucanr.edu/blogs/blogcore/postdetail.cfm?postnum=9554 This is part of a talk I gave last week in Marin County. These three annual thistles turn up everywhere in northern California, so it's nice to know them by name. They're mostly on disturbed sites, roadsides, and waste ground, but they can also establish on rangeland, pasture, and natural areas.They germinate and grow into rosettes during winter, then in spring they bolt and produce purple flowers. Like a lot of our weeds, these species originated in southern Europe, southwestern Asia,......
]]> Mon, 04 Mar 2013 10:37:47 PST http://ucanr.edu/blogs/blogcore/postdetail.cfm?postnum=9412&utm_source=RSS&utm_medium=RSS&utm_campaign=RSS%2BFeed gbkyser@ucdavis.edu(Guy Kyser) http://ucanr.edu/blogs/blogcore/postdetail.cfm?postnum=9412 Herbicides are defined as a chemical substance that is used to eliminate unwanted plants. This is a very general description and it is important to remember that herbicides differ with respect to when they are used (for example, pre-emergence or post-emergence), their activity (for example, contact or systemic), their selectivity (for example, grasses or broadleaves), and their mechanism of action (also known as: mode of action, site of action). (See this blog post about basic herbicide......
]]> Mon, 04 Mar 2013 07:58:40 PST http://ucanr.edu/blogs/blogcore/postdetail.cfm?postnum=9383&utm_source=RSS&utm_medium=RSS&utm_campaign=RSS%2BFeed lmsosnoskie@ucdavis.edu(Lynn Sosnoskie) http://ucanr.edu/blogs/blogcore/postdetail.cfm?postnum=9383 Mon, 25 Feb 2013 10:19:01 PST http://ucanr.edu/blogs/blogcore/postdetail.cfm?postnum=9363&utm_source=RSS&utm_medium=RSS&utm_campaign=RSS%2BFeed gperez@ucdavis.edu(Gale Perez) http://ucanr.edu/blogs/blogcore/postdetail.cfm?postnum=9363 [USDA 04 Feb 2013 by Ann Perry] -- Farmers can fine-tune their use of cover crops to help manage costs and maximize benefits in commercial organic production systems, according to U.S. Department of Agriculture (USDA) scientists. Production expenses for high-value organic crops like lettuce and broccoli can exceed $7,000 per acre, so producers often try to streamline costs with an annual two- to three-crop rotation. Agricultural Research Service (ARS) horticulturalist Eric Brennan designed a......
]]> Mon, 25 Feb 2013 10:08:47 PST http://ucanr.edu/blogs/blogcore/postdetail.cfm?postnum=9362&utm_source=RSS&utm_medium=RSS&utm_campaign=RSS%2BFeed gperez@ucdavis.edu(Gale Perez) http://ucanr.edu/blogs/blogcore/postdetail.cfm?postnum=9362 Fri, 22 Feb 2013 18:02:51 PST http://ucanr.edu/blogs/blogcore/postdetail.cfm?postnum=9357&utm_source=RSS&utm_medium=RSS&utm_campaign=RSS%2BFeed bhanson@ucdavis.edu(Brad Hanson) http://ucanr.edu/blogs/blogcore/postdetail.cfm?postnum=9357 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......
]]> Thu, 14 Feb 2013 11:33:18 PST http://ucanr.edu/blogs/blogcore/postdetail.cfm?postnum=9299&utm_source=RSS&utm_medium=RSS&utm_campaign=RSS%2BFeed djmunier@ucanr.edu(Douglas Munier) http://ucanr.edu/blogs/blogcore/postdetail.cfm?postnum=9299 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......
]]> Tue, 05 Feb 2013 17:49:18 PST http://ucanr.edu/blogs/blogcore/postdetail.cfm?postnum=9230&utm_source=RSS&utm_medium=RSS&utm_campaign=RSS%2BFeed rifsmith@ucanr.edu(Richard Smith) http://ucanr.edu/blogs/blogcore/postdetail.cfm?postnum=9230 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......
]]> Tue, 05 Feb 2013 09:35:17 PST http://ucanr.edu/blogs/blogcore/postdetail.cfm?postnum=9216&utm_source=RSS&utm_medium=RSS&utm_campaign=RSS%2BFeed lmsosnoskie@ucdavis.edu(Lynn Sosnoskie) http://ucanr.edu/blogs/blogcore/postdetail.cfm?postnum=9216 Fri, 01 Feb 2013 09:13:12 PST http://ucanr.edu/blogs/blogcore/postdetail.cfm?postnum=9195&utm_source=RSS&utm_medium=RSS&utm_campaign=RSS%2BFeed gperez@ucdavis.edu(Gale Perez) http://ucanr.edu/blogs/blogcore/postdetail.cfm?postnum=9195 Wed, 30 Jan 2013 10:45:57 PST http://ucanr.edu/blogs/blogcore/postdetail.cfm?postnum=9166&utm_source=RSS&utm_medium=RSS&utm_campaign=RSS%2BFeed gperez@ucdavis.edu(Gale Perez) http://ucanr.edu/blogs/blogcore/postdetail.cfm?postnum=9166 Mon, 28 Jan 2013 13:23:45 PST http://ucanr.edu/blogs/blogcore/postdetail.cfm?postnum=9146&utm_source=RSS&utm_medium=RSS&utm_campaign=RSS%2BFeed jmditomaso@ucdavis.edu(Joseph DiTomaso) http://ucanr.edu/blogs/blogcore/postdetail.cfm?postnum=9146 Sat, 26 Jan 2013 08:14:53 PST http://ucanr.edu/blogs/blogcore/postdetail.cfm?postnum=9140&utm_source=RSS&utm_medium=RSS&utm_campaign=RSS%2BFeed gperez@ucdavis.edu(Gale Perez) http://ucanr.edu/blogs/blogcore/postdetail.cfm?postnum=9140 One of the biggest challenges to growing a vegetable garden in a non-raisedbed situation can be the weeds. The can make the garden unsightly, compete with the vegetable plants you really want and make you feel overwhelmed in trying to manage them. Here is your five step plan to a better garden with fewer weeds: Step one: Control existing weeds. If your garden has any weeds, you first need to take care of them prior to doing anything (except planning). You have a couple of options. You......
]]> Tue, 22 Jan 2013 13:03:30 PST http://ucanr.edu/blogs/blogcore/postdetail.cfm?postnum=9106&utm_source=RSS&utm_medium=RSS&utm_campaign=RSS%2BFeed pgeisel@ucanr.edu(Pamela Geisel) http://ucanr.edu/blogs/blogcore/postdetail.cfm?postnum=9106 A quick note to day to remind people about the upcoming Western Society of Weed Science meeting that will be held March 11-14 at the Catamaran Resort in San Diego. This is a great place to get caught up on weed science issues in the western US and Canada. Because the meeting will be held in California this year, I think we'll see a lot of focus on CA issues. A copy of the meeting program is available HERE if you want to take a look. We'll have research posters and papers in each of our......
]]> Sun, 20 Jan 2013 14:34:10 PST http://ucanr.edu/blogs/blogcore/postdetail.cfm?postnum=9100&utm_source=RSS&utm_medium=RSS&utm_campaign=RSS%2BFeed bhanson@ucdavis.edu(Brad Hanson) http://ucanr.edu/blogs/blogcore/postdetail.cfm?postnum=9100 The International Weed Science Society meets every four years to discuss weed science issues on a global level. This past June (2012) the IWSS met in Hangzhou, China and, for the next four years, will be led by the new president Dr. Albert Fischer from UC Davis. Congratulations Albert! You can see Albert's presidential address to the IWSS here: http://www.iwss.info/president.php Several UC Weed Science folks (Fischer, Fennimore, Wright, Hanson) attended the meeting this year. This was my......
]]> Sun, 20 Jan 2013 14:06:10 PST http://ucanr.edu/blogs/blogcore/postdetail.cfm?postnum=9099&utm_source=RSS&utm_medium=RSS&utm_campaign=RSS%2BFeed bhanson@ucdavis.edu(Brad Hanson) http://ucanr.edu/blogs/blogcore/postdetail.cfm?postnum=9099 Thu, 17 Jan 2013 12:11:25 PST http://ucanr.edu/blogs/blogcore/postdetail.cfm?postnum=9085&utm_source=RSS&utm_medium=RSS&utm_campaign=RSS%2BFeed gperez@ucdavis.edu(Gale Perez) http://ucanr.edu/blogs/blogcore/postdetail.cfm?postnum=9085 Here's an article from the Sweetpotato Tips newsletter on hotbed cost production. Click here for a direct link to the January 2013 edition. PRODUCTION NOTES—Hotbeds Hotbeds begin soon. If you did not use methyl bromide in the last year, improve weed management by using Devrinol herbicide at a rate of 12 oz per 1000 ft of bed in 5-6 gallons of water (sprayer calibrated at 30 gpa). Apply before the first irrigation and prior to the emergence of weeds. Incorporate with a brief......
]]> Fri, 11 Jan 2013 13:00:57 PST http://ucanr.edu/blogs/blogcore/postdetail.cfm?postnum=9050&utm_source=RSS&utm_medium=RSS&utm_campaign=RSS%2BFeed gperez@ucdavis.edu(Gale Perez) http://ucanr.edu/blogs/blogcore/postdetail.cfm?postnum=9050 A quick post today to share a link to the California Weed Science Society Journal. Click here for a direct link to the January 2013 edition of the CWSS Research Update and News. This edition focuses on herbicide resistance and includes articles by UC Farm Advisors, UC Cooperative Extension Specialists, CSU-Fresno faculty, UC Davis researchers, and herbicide industry researchers : Introduction - Steve Orloff Selection pressure, shifting populations, and herbicide resistance - Lynn......
]]> Wed, 09 Jan 2013 12:34:06 PST http://ucanr.edu/blogs/blogcore/postdetail.cfm?postnum=9031&utm_source=RSS&utm_medium=RSS&utm_campaign=RSS%2BFeed bhanson@ucdavis.edu(Brad Hanson) http://ucanr.edu/blogs/blogcore/postdetail.cfm?postnum=9031 Along scenic corridors, county roads and state highways of the foothills of the Sierra Nevada mountain range, weeds—especially yellow starthistle and Italian thistle—are creating solid stands of invasion that defy control. The California Department of Transportation (CalTrans) manages over 15,000 miles of roadway and over 230,000 acres of right of way. Along state highways CalTrans manages a narrow easement strip on either side of the roadway for vegetation control. According to......
]]> Sun, 06 Jan 2013 20:34:26 PST http://ucanr.edu/blogs/blogcore/postdetail.cfm?postnum=9008&utm_source=RSS&utm_medium=RSS&utm_campaign=RSS%2BFeed rmillercripps@ucanr.edu(Rebecca Miller-Cripps) http://ucanr.edu/blogs/blogcore/postdetail.cfm?postnum=9008 The Weed Science Society of America (WSSA) Public Awareness Committee with contributions from WSSA members, released a new fact sheet on weeds.The press release text is pasted the text below (in black) or you can click HERE for the direct link. Click here for a link to the pdf.Brad WSSA OFFERS NEW FACT SHEET ON WEEDS, THE BULLIES OF THE PLANT WORLD Did you know that the invention of Velcro® was inspired by prickly weed burs that stuck to the pants of a Swiss engineer during a walk with......
]]> Sat, 05 Jan 2013 15:23:14 PST http://ucanr.edu/blogs/blogcore/postdetail.cfm?postnum=9007&utm_source=RSS&utm_medium=RSS&utm_campaign=RSS%2BFeed bhanson@ucdavis.edu(Brad Hanson) http://ucanr.edu/blogs/blogcore/postdetail.cfm?postnum=9007 Despite the fact that I am currently working in orchards and vineyards, I receive lots of requests to discuss Palmer amaranth (Amaranthus palmeri S. Wats.), a weed that I spent almost six years studying. It's the scourge of the Southeastern United States - and a weed that I think everyone should be (or at least become) very conscious of. Considering that Palmer amaranth is starting to rear an ugly head in California cotton and perennial cropping systems, I thought that I might start a series......
]]> Thu, 03 Jan 2013 08:20:51 PST http://ucanr.edu/blogs/blogcore/postdetail.cfm?postnum=8989&utm_source=RSS&utm_medium=RSS&utm_campaign=RSS%2BFeed lmsosnoskie@ucdavis.edu(Lynn Sosnoskie) http://ucanr.edu/blogs/blogcore/postdetail.cfm?postnum=8989 Happy New Year! A quick post today to share an article I wrote last fall for Western Fruit Grower (Nov/Dec 2012) It was in a section called "California Nut Report" which is about California nuts, not by them.. I think). The online, and professionally edited version of the article can be found here. Take care, Brad Nov/Dec 2012 Nut harvest is over and, barring another dry winter, the fall rains should be starting up in the western tree nut production regions. Now is the time when nut......
]]> Wed, 02 Jan 2013 11:35:31 PST http://ucanr.edu/blogs/blogcore/postdetail.cfm?postnum=8985&utm_source=RSS&utm_medium=RSS&utm_campaign=RSS%2BFeed bhanson@ucdavis.edu(Brad Hanson) http://ucanr.edu/blogs/blogcore/postdetail.cfm?postnum=8985 A couple years ago, I posted some statistics on the tree, vine, and berry acreage in California because I find that kind of thing interesting and thought others might too. The bad news is that the book chapter revision that I originally compiled those data for is still not done; however the good news (?) is that I updated those T&V acreage data and I still find them interesting (my two-year revision of that book chapter, somewhat less interesting...). In the 2011 crop season, the two......
]]> Fri, 28 Dec 2012 16:24:14 PST http://ucanr.edu/blogs/blogcore/postdetail.cfm?postnum=8971&utm_source=RSS&utm_medium=RSS&utm_campaign=RSS%2BFeed bhanson@ucdavis.edu(Brad Hanson) http://ucanr.edu/blogs/blogcore/postdetail.cfm?postnum=8971 Today, instead of posting something about weed control and herbicide resistance in orchards and vineyards, I thought I'd go out on a limb and discuss weed management and herbicide resistance in... alfalfa! (Yes, it gets a little wild around the holidays at UC Weed Science...) Anyway, while working on some articles for an upcoming volume of the California Weed Science Society Journal (CWSSJ), I was reminded of a really nice UCANR publication "Avoiding Weed Shifts and Weed Resistance in Roundup......
]]> Fri, 28 Dec 2012 12:34:42 PST http://ucanr.edu/blogs/blogcore/postdetail.cfm?postnum=8969&utm_source=RSS&utm_medium=RSS&utm_campaign=RSS%2BFeed bhanson@ucdavis.edu(Brad Hanson) http://ucanr.edu/blogs/blogcore/postdetail.cfm?postnum=8969 Following up on my post last week about T&V herbicide changes, today I want to focus on hot-off-the-presses information about Alion (active ingredient = indaziflam) manufactured by Bayer CropScience. Alion herbicide, which was labeled in California tree nuts, citrus, stone fruit and pome fruit was just received a supplemental label for use in grapes. For grapes there is not a range of use rates like in orchards - only 5 fl oz of product per acre (0.065 lb ai/A) is registered and only one......
]]> Thu, 20 Dec 2012 16:55:47 PST http://ucanr.edu/blogs/blogcore/postdetail.cfm?postnum=8949&utm_source=RSS&utm_medium=RSS&utm_campaign=RSS%2BFeed bhanson@ucdavis.edu(Brad Hanson) http://ucanr.edu/blogs/blogcore/postdetail.cfm?postnum=8949 Mick Canevari, Emeritus Farm Advisor and Brent Holtz, Farm Advisor, County Director Weeds have a tremendous capacity to spread within an orchard. The first line of defense is identifying the weeds you need to control, and selecting the best herbicides or cultural practices to control those weeds. If you use the same herbicide(s) each year, a shift to tolerant weed species will ultimately take over and a loss of herbicide effectiveness will occur. Alternating products with different modes of......
]]> Thu, 20 Dec 2012 09:21:34 PST http://ucanr.edu/blogs/blogcore/postdetail.cfm?postnum=8946&utm_source=RSS&utm_medium=RSS&utm_campaign=RSS%2BFeed bhanson@ucdavis.edu(Brad Hanson) http://ucanr.edu/blogs/blogcore/postdetail.cfm?postnum=8946 Wed, 19 Dec 2012 11:15:56 PST http://ucanr.edu/blogs/blogcore/postdetail.cfm?postnum=8941&utm_source=RSS&utm_medium=RSS&utm_campaign=RSS%2BFeed gperez@ucdavis.edu(Gale Perez) http://ucanr.edu/blogs/blogcore/postdetail.cfm?postnum=8941 Mon, 17 Dec 2012 12:24:53 PST http://ucanr.edu/blogs/blogcore/postdetail.cfm?postnum=8913&utm_source=RSS&utm_medium=RSS&utm_campaign=RSS%2BFeed rifsmith@ucanr.edu(Richard Smith) http://ucanr.edu/blogs/blogcore/postdetail.cfm?postnum=8913 Tue, 11 Dec 2012 18:01:16 PST http://ucanr.edu/blogs/blogcore/postdetail.cfm?postnum=8877&utm_source=RSS&utm_medium=RSS&utm_campaign=RSS%2BFeed bhanson@ucdavis.edu(Brad Hanson) http://ucanr.edu/blogs/blogcore/postdetail.cfm?postnum=8877 Mon, 10 Dec 2012 17:25:02 PST http://ucanr.edu/blogs/blogcore/postdetail.cfm?postnum=8869&utm_source=RSS&utm_medium=RSS&utm_campaign=RSS%2BFeed bhanson@ucdavis.edu(Brad Hanson) http://ucanr.edu/blogs/blogcore/postdetail.cfm?postnum=8869 Sat, 08 Dec 2012 20:13:39 PST http://ucanr.edu/blogs/blogcore/postdetail.cfm?postnum=8861&utm_source=RSS&utm_medium=RSS&utm_campaign=RSS%2BFeed gperez@ucdavis.edu(Gale Perez) http://ucanr.edu/blogs/blogcore/postdetail.cfm?postnum=8861 Sat, 08 Dec 2012 15:21:04 PST http://ucanr.edu/blogs/blogcore/postdetail.cfm?postnum=8860&utm_source=RSS&utm_medium=RSS&utm_campaign=RSS%2BFeed bhanson@ucdavis.edu(Brad Hanson) http://ucanr.edu/blogs/blogcore/postdetail.cfm?postnum=8860 Sat, 08 Dec 2012 13:33:48 PST http://ucanr.edu/blogs/blogcore/postdetail.cfm?postnum=8859&utm_source=RSS&utm_medium=RSS&utm_campaign=RSS%2BFeed bhanson@ucdavis.edu(Brad Hanson) http://ucanr.edu/blogs/blogcore/postdetail.cfm?postnum=8859 I received a press release this week from the Weed Science Society of America (WSSA) that I thought would be of interest to followers of the UC Weed Science blog (link above, or attached below). The press release lays out a dozen examples of "unfortunate (and illegal) consequences that can happen when you don't" follow the information on a pesticide label. I thought the first reason (wrong product, or right product at wrong rate) was a good followup point to Cheryl's post a few months ago......
]]> Tue, 04 Dec 2012 15:00:44 PST http://ucanr.edu/blogs/blogcore/postdetail.cfm?postnum=8835&utm_source=RSS&utm_medium=RSS&utm_campaign=RSS%2BFeed bhanson@ucdavis.edu(Brad Hanson) http://ucanr.edu/blogs/blogcore/postdetail.cfm?postnum=8835 I recently received an email notification about a newly identified vineyard disease called grapevine redblotch. Although this is not really a weed science issue, I thought the symptoms might be confused with other biotic and abiotic problems (such as herbicides). So, I thought I'd share the news brochure (attached below) that Drs. Sudarshana (USDA-ARS, Davis) and Wolpert (UC Davis) put together about the disease. Here's a link to a related article on the disease in the trade publication......
]]> Tue, 04 Dec 2012 12:36:10 PST http://ucanr.edu/blogs/blogcore/postdetail.cfm?postnum=8833&utm_source=RSS&utm_medium=RSS&utm_campaign=RSS%2BFeed bhanson@ucdavis.edu(Brad Hanson) http://ucanr.edu/blogs/blogcore/postdetail.cfm?postnum=8833 Before I go out the door for the Thanksgiving holiday weekend, I wanted to share a link to the recent Western IPM Center newsletter, The Western Front. The October 2012 edition had a really nice writeup about the glyphosate-resistant weed workshops and IPM publications that I mentioned in my October 29 post. The author did a great job summarizing the issues, objectives, and even the IPM publications so I'll encourage you to take a look for yourself. Click the link for more information on......
]]> Wed, 21 Nov 2012 15:39:21 PST http://ucanr.edu/blogs/blogcore/postdetail.cfm?postnum=8768&utm_source=RSS&utm_medium=RSS&utm_campaign=RSS%2BFeed bhanson@ucdavis.edu(Brad Hanson) http://ucanr.edu/blogs/blogcore/postdetail.cfm?postnum=8768 I received a press release this week from the Weed Science Society of America (WSSA) that I thought would be interesting to repost here. The statement entitled: Three Leading Scientific Societies Take and Objective Look at the Issues Associated with "Least Toxic Pesticides" Applied as a "Last Resort" was co-authored by the WSSA, The American Phytopathological Society (APS), and the Plant-Insect Ecosystems Section of the Entomological Society of America (P-IE ESA). Many folks argue that, if......
]]> Sun, 18 Nov 2012 13:56:16 PST http://ucanr.edu/blogs/blogcore/postdetail.cfm?postnum=8742&utm_source=RSS&utm_medium=RSS&utm_campaign=RSS%2BFeed bhanson@ucdavis.edu(Brad Hanson) http://ucanr.edu/blogs/blogcore/postdetail.cfm?postnum=8742 One of my research focus areas over the past few years has been related to soil fumigation issues, specifically focused on methyl bromide alternatives for the tree and vine nursery industry. I described some of this nursery work in a post late last year. Today I wanted to share a brief description and links containing a more overarching view of methyl bromide alternatives related research in California, Oregon, and Washington. With the support of USDA-ARS, a five-year program was initiated......
]]> Sun, 11 Nov 2012 13:21:37 PST http://ucanr.edu/blogs/blogcore/postdetail.cfm?postnum=8705&utm_source=RSS&utm_medium=RSS&utm_campaign=RSS%2BFeed bhanson@ucdavis.edu(Brad Hanson) http://ucanr.edu/blogs/blogcore/postdetail.cfm?postnum=8705 A quick post today to share a link to the recently revised "UC IPM Pest Management Guidelines for Pear" (UC ANR Publication #3455). You can download the whole document as a pdf here, or use it online at the above link. Although there are also well-written sections on general pear pest management, as well as specific information on insects, mites, and diseases of pears, since this is the Weed Science blog, I'd better post a link directly to the Integrated Weed Management section authored......
]]> Sun, 11 Nov 2012 12:50:39 PST http://ucanr.edu/blogs/blogcore/postdetail.cfm?postnum=8704&utm_source=RSS&utm_medium=RSS&utm_campaign=RSS%2BFeed bhanson@ucdavis.edu(Brad Hanson) http://ucanr.edu/blogs/blogcore/postdetail.cfm?postnum=8704 Yellowflag iris (Iris pseudacorus L.), native to Europe, is an emergent invasive of pond margins, ditches, and other wetland sites in much of the United States. It forms dense stands which displace native sedges and rushes, reducing waterfowl habitat and water flow. Yellowflag iris reproduces by seeds and through rhizome fragmentation. The rhizomes make it hard to remove mechanically. Accessing an infestation for making herbicide applications can be problematic. Because of its height and......
]]> Mon, 05 Nov 2012 12:55:31 PST http://ucanr.edu/blogs/blogcore/postdetail.cfm?postnum=8658&utm_source=RSS&utm_medium=RSS&utm_campaign=RSS%2BFeed gbkyser@ucdavis.edu(Guy Kyser) http://ucanr.edu/blogs/blogcore/postdetail.cfm?postnum=8658 Fri, 02 Nov 2012 13:41:17 PST http://ucanr.edu/blogs/blogcore/postdetail.cfm?postnum=8651&utm_source=RSS&utm_medium=RSS&utm_campaign=RSS%2BFeed gperez@ucdavis.edu(Gale Perez) http://ucanr.edu/blogs/blogcore/postdetail.cfm?postnum=8651 Happy Halloween! Today I wanted to follow up on a previous post on the phenonena of enhanced microbial degradation of the residual herbicide simazine in orchards and vineyards. In that post, I described research that we did a few years ago to address faster-than-normal degradation of simazine in citrus orchards. The results of concurrent study done in raisin vineyards near Parlier was published in the most recent issue of the journal Weed Science. Unfortunately, that journal is not......
]]> Wed, 31 Oct 2012 12:26:24 PST http://ucanr.edu/blogs/blogcore/postdetail.cfm?postnum=8633&utm_source=RSS&utm_medium=RSS&utm_campaign=RSS%2BFeed bhanson@ucdavis.edu(Brad Hanson) http://ucanr.edu/blogs/blogcore/postdetail.cfm?postnum=8633 Mon, 29 Oct 2012 15:04:54 PST http://ucanr.edu/blogs/blogcore/postdetail.cfm?postnum=8603&utm_source=RSS&utm_medium=RSS&utm_campaign=RSS%2BFeed bhanson@ucdavis.edu(Brad Hanson) http://ucanr.edu/blogs/blogcore/postdetail.cfm?postnum=8603 Many growers have good intentions when it comes to controlling weeds in seedling alfalfa but often fields end up being treated beyond the optimum window. Proper application timing is critical for successful weed control in seedling alfalfa. Not only do weeds reduce the nutritional quality of the alfalfa and reduce alfalfa vigor, but weeds in seedling alfalfa can affect stand density potentially resulting in reduced alfalfa yield over the life of the stand. When herbicides are applied late, weed......
]]> Tue, 16 Oct 2012 14:36:37 PST http://ucanr.edu/blogs/blogcore/postdetail.cfm?postnum=8525&utm_source=RSS&utm_medium=RSS&utm_campaign=RSS%2BFeed sborloff@ucanr.edu(Steve Orloff) http://ucanr.edu/blogs/blogcore/postdetail.cfm?postnum=8525 Tue, 16 Oct 2012 13:47:44 PST http://ucanr.edu/blogs/blogcore/postdetail.cfm?postnum=8524&utm_source=RSS&utm_medium=RSS&utm_campaign=RSS%2BFeed gperez@ucdavis.edu(Gale Perez) http://ucanr.edu/blogs/blogcore/postdetail.cfm?postnum=8524 Tue, 16 Oct 2012 11:53:47 PST http://ucanr.edu/blogs/blogcore/postdetail.cfm?postnum=8521&utm_source=RSS&utm_medium=RSS&utm_campaign=RSS%2BFeed djmunier@ucanr.edu(Douglas Munier) http://ucanr.edu/blogs/blogcore/postdetail.cfm?postnum=8521 Tue, 16 Oct 2012 08:09:15 PST http://ucanr.edu/blogs/blogcore/postdetail.cfm?postnum=8514&utm_source=RSS&utm_medium=RSS&utm_campaign=RSS%2BFeed gperez@ucdavis.edu(Gale Perez) http://ucanr.edu/blogs/blogcore/postdetail.cfm?postnum=8514 Thu, 11 Oct 2012 08:28:22 PST http://ucanr.edu/blogs/blogcore/postdetail.cfm?postnum=8485&utm_source=RSS&utm_medium=RSS&utm_campaign=RSS%2BFeed gperez@ucdavis.edu(Gale Perez) http://ucanr.edu/blogs/blogcore/postdetail.cfm?postnum=8485 Good things come to those that wait. Well, when it came to getting a registration for prometryn for use on cilantro, wait we did. I recall doing the first trials on prometryn for use on cilantro in 1999. Since that time we worked closely with Becky Sisco at the Western Region of the IR4 Program to establish the tolerance for this material on cilantro. IR4 did their part and the packet was submitted to EPA. Given that cilantro is a very minor crop, the label was ultimately grouped with carrots,......
]]> Wed, 10 Oct 2012 14:26:47 PST http://ucanr.edu/blogs/blogcore/postdetail.cfm?postnum=8479&utm_source=RSS&utm_medium=RSS&utm_campaign=RSS%2BFeed rifsmith@ucanr.edu(Richard Smith) http://ucanr.edu/blogs/blogcore/postdetail.cfm?postnum=8479 Mon, 08 Oct 2012 07:51:04 PST http://ucanr.edu/blogs/blogcore/postdetail.cfm?postnum=8450&utm_source=RSS&utm_medium=RSS&utm_campaign=RSS%2BFeed gperez@ucdavis.edu(Gale Perez) http://ucanr.edu/blogs/blogcore/postdetail.cfm?postnum=8450 Fri, 28 Sep 2012 13:28:29 PST http://ucanr.edu/blogs/blogcore/postdetail.cfm?postnum=8405&utm_source=RSS&utm_medium=RSS&utm_campaign=RSS%2BFeed cjmcdonald@ucanr.edu(Chris McDonald) http://ucanr.edu/blogs/blogcore/postdetail.cfm?postnum=8405 Several field experiments were conducted to evaluate the performance of pre-emergence herbicides, herbicide rates, and tankmix combinations at different locations in the Central Valley of California and to compare the efficacy of burndown herbicides in mixture with different pre-emergence herbicides. The same treatments were used in three studies located in Fresno, Merced, and Colusa counties. Only data from the Merced county site is presented due to low weed densities at the Fresno and Colusa......
]]> Wed, 26 Sep 2012 14:25:55 PST http://ucanr.edu/blogs/blogcore/postdetail.cfm?postnum=8392&utm_source=RSS&utm_medium=RSS&utm_campaign=RSS%2BFeed bhanson@ucdavis.edu(Brad Hanson) http://ucanr.edu/blogs/blogcore/postdetail.cfm?postnum=8392 Everywhere you turn these days, the term “citizen science” is in use. The National Wildlife Federation (NWF) dedicates a page of its website to the topic. In July, the Ecological Society of America (ESA) published a supplemental journal devoted wholly to the topic of citizen science—its history, current status, and potential for the future. When staying with friends last week, I had my morning coffee in a mug labeled “Central Valley Winter Raptor Count –......
]]> Mon, 10 Sep 2012 12:06:50 PST http://ucanr.edu/blogs/blogcore/postdetail.cfm?postnum=8297&utm_source=RSS&utm_medium=RSS&utm_campaign=RSS%2BFeed rmillercripps@ucanr.edu(Rebecca Miller-Cripps) http://ucanr.edu/blogs/blogcore/postdetail.cfm?postnum=8297 Fri, 31 Aug 2012 17:09:30 PST http://ucanr.edu/blogs/blogcore/postdetail.cfm?postnum=8258&utm_source=RSS&utm_medium=RSS&utm_campaign=RSS%2BFeed bhanson@ucdavis.edu(Brad Hanson) http://ucanr.edu/blogs/blogcore/postdetail.cfm?postnum=8258 In June we visited a first-leaf almond orchard that had started the season growing normally, but as the root system expanded, the trees’ growth became rapidly stunted (Fig. 1). The newly expanding shoot tips showed ‘little leaf’ symptoms (Fig. 2) characteristic of glyphosate injury, with an incredible proliferation of shoots (Fig. 3) growing from the same point on the scaffolds. After investigating crop rotations, we learned that the trees showing symptoms had followed......
]]> Wed, 15 Aug 2012 12:57:12 PST http://ucanr.edu/blogs/blogcore/postdetail.cfm?postnum=8146&utm_source=RSS&utm_medium=RSS&utm_campaign=RSS%2BFeed gperez@ucdavis.edu(Gale Perez) http://ucanr.edu/blogs/blogcore/postdetail.cfm?postnum=8146 Sun, 12 Aug 2012 20:14:05 PST http://ucanr.edu/blogs/blogcore/postdetail.cfm?postnum=8125&utm_source=RSS&utm_medium=RSS&utm_campaign=RSS%2BFeed gperez@ucdavis.edu(Gale Perez) http://ucanr.edu/blogs/blogcore/postdetail.cfm?postnum=8125 Abstract: Cheatgrass and its cousin, red brome, are exotic annual grasses that have invaded and altered ecosystem dynamics in more than 41 million acres of desert shrublands between the Rockies and the Cascade-Sierra chain. A fungus naturally associated with these Bromus species has been found lethal to the plants' soil-banked dormant seeds. Supported by the Joint Fire Science Program (JFSP), researchers Susan Meyer, Phil Allen, and Julie Beckstead cultured this fungus, Pyrenophora semeniperda,......
]]> Thu, 09 Aug 2012 09:28:03 PST http://ucanr.edu/blogs/blogcore/postdetail.cfm?postnum=8113&utm_source=RSS&utm_medium=RSS&utm_campaign=RSS%2BFeed gperez@ucdavis.edu(Gale Perez) http://ucanr.edu/blogs/blogcore/postdetail.cfm?postnum=8113 Mon, 06 Aug 2012 13:38:41 PST http://ucanr.edu/blogs/blogcore/postdetail.cfm?postnum=8085&utm_source=RSS&utm_medium=RSS&utm_campaign=RSS%2BFeed bhanson@ucdavis.edu(Brad Hanson) http://ucanr.edu/blogs/blogcore/postdetail.cfm?postnum=8085 The development of improved cultivation technology for row crop production has been an active area of research, and has made significant progress in recent years. Currently, standard cultivation removes weeds from the majority of the bed using sweeps, knives, coulters and blades. Typically a 4-inch wide band is left around the seedline. Weeds in the uncultivated band are typically removed by hand, and the density of weeds that occur there, determines how laborious and costly subsequent hand......
]]> Thu, 02 Aug 2012 08:40:48 PST http://ucanr.edu/blogs/blogcore/postdetail.cfm?postnum=8059&utm_source=RSS&utm_medium=RSS&utm_campaign=RSS%2BFeed gperez@ucdavis.edu(Gale Perez) http://ucanr.edu/blogs/blogcore/postdetail.cfm?postnum=8059 For the past 12 years, county-based Weed Management Areas (WMA) have organized and collaborated to detect, map and treat invasive weeds around the state. These partnerships, usually spearheaded by County Agriculture Departments, University of Cooperative Extension or Resource Conservation Districts, include a wide array of landowners and land managers --- from U.S. Forest Service, PG&E, local Irrigation and Water Districts, Caltrans, County Departments of Transportation to the California......
]]> Fri, 27 Jul 2012 16:08:10 PST http://ucanr.edu/blogs/blogcore/postdetail.cfm?postnum=8027&utm_source=RSS&utm_medium=RSS&utm_campaign=RSS%2BFeed wkwest@ucanr.edu(Wendy West) http://ucanr.edu/blogs/blogcore/postdetail.cfm?postnum=8027 Last Thursday (July 19th) was the 56th annual UC Weed Day at the Davis campus. We had a really good turnout again this year with just under 150 participants including weed science researchers, students, farmers, land managers, pest consultants, and government agency people in attendance. Cooperative Extension Specialist Tom Lanini organized the morning field tour and afternoon presentation session and ordered up really great weather for the day. We started out on campus for registration......
]]> Fri, 27 Jul 2012 15:44:12 PST http://ucanr.edu/blogs/blogcore/postdetail.cfm?postnum=8023&utm_source=RSS&utm_medium=RSS&utm_campaign=RSS%2BFeed bhanson@ucdavis.edu(Brad Hanson) http://ucanr.edu/blogs/blogcore/postdetail.cfm?postnum=8023 Today I thought I'd share a recent research report on the the phenomenon of "enhanced" degradation of the herbicide simazine in citrus orchard soils. Click here for a link to the publication in the open-source journal, Air, Soil, and Water Research (Abit et al. 2012. Air Soil and Water Research 5:69-78). The lead author was a UC Davis post doctoral researcher and her coauthors include UC Davis, USDA-ARS, Fresno State, and UC Cooperative Extension folks. This work was started several years......
]]> Wed, 18 Jul 2012 11:08:16 PST http://ucanr.edu/blogs/blogcore/postdetail.cfm?postnum=7953&utm_source=RSS&utm_medium=RSS&utm_campaign=RSS%2BFeed bhanson@ucdavis.edu(Brad Hanson) http://ucanr.edu/blogs/blogcore/postdetail.cfm?postnum=7953 Wed, 18 Jul 2012 10:46:07 PST http://ucanr.edu/blogs/blogcore/postdetail.cfm?postnum=7954&utm_source=RSS&utm_medium=RSS&utm_campaign=RSS%2BFeed jmditomaso@ucdavis.edu(Joseph DiTomaso) http://ucanr.edu/blogs/blogcore/postdetail.cfm?postnum=7954 Wed, 18 Jul 2012 09:28:51 PST http://ucanr.edu/blogs/blogcore/postdetail.cfm?postnum=7952&utm_source=RSS&utm_medium=RSS&utm_campaign=RSS%2BFeed bhanson@ucdavis.edu(Brad Hanson) http://ucanr.edu/blogs/blogcore/postdetail.cfm?postnum=7952 Sat, 14 Jul 2012 19:10:01 PST http://ucanr.edu/blogs/blogcore/postdetail.cfm?postnum=7931&utm_source=RSS&utm_medium=RSS&utm_campaign=RSS%2BFeed cawilen@ucanr.edu(Cheryl Wilen) http://ucanr.edu/blogs/blogcore/postdetail.cfm?postnum=7931 Fri, 13 Jul 2012 12:19:04 PST http://ucanr.edu/blogs/blogcore/postdetail.cfm?postnum=7927&utm_source=RSS&utm_medium=RSS&utm_campaign=RSS%2BFeed gperez@ucdavis.edu(Gale Perez) http://ucanr.edu/blogs/blogcore/postdetail.cfm?postnum=7927 Thu, 12 Jul 2012 12:03:25 PST http://ucanr.edu/blogs/blogcore/postdetail.cfm?postnum=7915&utm_source=RSS&utm_medium=RSS&utm_campaign=RSS%2BFeed gperez@ucdavis.edu(Gale Perez) http://ucanr.edu/blogs/blogcore/postdetail.cfm?postnum=7915 The Mediterranean annual grass barb goatgrass (Aegilops triuncialis) is widely hated by land managers, and with good reason. Grazers avoid its tough, silica-rich foliage. In early summer it produces big, centipede-like, spiny-awned seedheads, which we call “crotch rockets” on account of what they do when they get inside your pants leg. Barb goatgrass is also tolerant of serpentine soils, presenting a threat to some California endemic species. Many ranchers consider this......
]]> Mon, 09 Jul 2012 08:23:00 PST http://ucanr.edu/blogs/blogcore/postdetail.cfm?postnum=7868&utm_source=RSS&utm_medium=RSS&utm_campaign=RSS%2BFeed gbkyser@ucdavis.edu(Guy Kyser) http://ucanr.edu/blogs/blogcore/postdetail.cfm?postnum=7868 Fri, 06 Jul 2012 10:37:38 PST http://ucanr.edu/blogs/blogcore/postdetail.cfm?postnum=7866&utm_source=RSS&utm_medium=RSS&utm_campaign=RSS%2BFeed gperez@ucdavis.edu(Gale Perez) http://ucanr.edu/blogs/blogcore/postdetail.cfm?postnum=7866 Mon, 02 Jul 2012 07:58:25 PST http://ucanr.edu/blogs/blogcore/postdetail.cfm?postnum=7839&utm_source=RSS&utm_medium=RSS&utm_campaign=RSS%2BFeed gperez@ucdavis.edu(Gale Perez) http://ucanr.edu/blogs/blogcore/postdetail.cfm?postnum=7839 Thu, 28 Jun 2012 11:32:26 PST http://ucanr.edu/blogs/blogcore/postdetail.cfm?postnum=7824&utm_source=RSS&utm_medium=RSS&utm_campaign=RSS%2BFeed bhanson@ucdavis.edu(Brad Hanson) http://ucanr.edu/blogs/blogcore/postdetail.cfm?postnum=7824 2010-2011 Roadside Weed Control Evaluation with Organic and Conventional Herbicides Richard Smith and Steve Tjosvold, Farm Advisors University of California Cooperative Extension, Monterey and Santa Cruz Counties A trial was established near Bonny Doon, California (in the Santa Cruz mountains). The objective of the trial was to screen alternative roadside herbicides in the wake of the ban on the use of glyphosate for roadside weed control imposed by the Santa Cruz County board......
]]> Tue, 26 Jun 2012 08:26:39 PST http://ucanr.edu/blogs/blogcore/postdetail.cfm?postnum=7798&utm_source=RSS&utm_medium=RSS&utm_campaign=RSS%2BFeed rifsmith@ucanr.edu(Richard Smith) http://ucanr.edu/blogs/blogcore/postdetail.cfm?postnum=7798 Fri, 22 Jun 2012 13:29:57 PST http://ucanr.edu/blogs/blogcore/postdetail.cfm?postnum=7771&utm_source=RSS&utm_medium=RSS&utm_campaign=RSS%2BFeed djmunier@ucanr.edu(Douglas Munier) http://ucanr.edu/blogs/blogcore/postdetail.cfm?postnum=7771 Check out the June 2012 issue of the Retail Nursery and Garden Center IPM News FEATURES:• Tools for Removing Dandelions and Other Weeds • Invasive Plants Sold in California • User-friendly Weed Identification Tool...
]]> Wed, 20 Jun 2012 17:24:52 PST http://ucanr.edu/blogs/blogcore/postdetail.cfm?postnum=7773&utm_source=RSS&utm_medium=RSS&utm_campaign=RSS%2BFeed gperez@ucdavis.edu(Gale Perez) http://ucanr.edu/blogs/blogcore/postdetail.cfm?postnum=7773 Weed Day 2012 comes to UC Davis July 19 The latest developments in weed control will once again take center stage at UC Davis when scores of scientists, students, regulators and more gather July 19, 2012 for the 56th annual Weed Day at the Buehler Visitors & Alumni Center. The morning field tours include: preharvest burndown treatment comparison in walnuts; Dittrichia, tarweed and yellow starthistle root growth dynamics; weed control and herbicide safety in melons; effect on herbicides on......
]]> Mon, 18 Jun 2012 09:11:55 PST http://ucanr.edu/blogs/blogcore/postdetail.cfm?postnum=7750&utm_source=RSS&utm_medium=RSS&utm_campaign=RSS%2BFeed gperez@ucdavis.edu(Gale Perez) http://ucanr.edu/blogs/blogcore/postdetail.cfm?postnum=7750