Intra Row Weeding Machine Demonstration
Wednesday, July 23, 2014
9:00 to 10:00 a.m.
USDA East Alisal Research Station
1636 East Alisal Road (follow signs)
The area of mechanical weed control is developing rapidly in Europe. This machine is designed to remove weeds in the seedline. This meeting is a good opportunity to view this technology and see if it fits your operation and weeding needs.
- The Robovator (Poulsen Engineering, Denmark) intra row weeding machine will be demonstrated in a field of transplanted lettuce
- The machine uses a split knife that opens around crop plants and closes between plants to take out weeds
- It can be used in both conventional and organic production systems
- There will be ample opportunity to watch the machine work and discuss with company representatives and researchers
- Christian Kirchhoff, Kress Co., Germany
- Steve Fennimore, Extension Vegetable Weed Control Specialist, UC Davis
- Richard Smith, Vegetable Crop and Weed Science Farm Advisor, Monterey County
No registration fee.
For more information call Richard at 759-7357.
Link today to the newest edition of an important reference book for herbicides - the Weed Science Society of America's "Herbicide Handbook". Dr. Dale Shaner took on the updating and revision of the 10th Edition (at over 500 pages of very dense information, this was no small task!).
This resource is fantastic and is the one reference book that I use nearly every day. Mine is always within arms reach in my office. Take a look if you routinely work with herbicide active ingredients - there is a tremendous amount of herbicide info in this book, especially considering the price.
The Weed Science Society of America is proud to announce that the 10th Edition of the Herbicide Handbook is now available for $95. This includes shipping/handling. The Herbicide Handbook, 10th Edition includes:
- Detailed information on more than 230 herbicides currently in commercial production
- A new, easy-to-use alphabetical format
- Useful glossary of technical terms
- Listings for adjuvants
10th edition of WSSA Herbicide Handbook
The 58th annual event was no different, which pleased event Chairman Brad Hanson, himself a weed scientist from UC Davis.
Morning activities typically include tours of the UC Davis field plots and the USDA-ARS station on campus, with afternoon sessions featuring presentations related to current research and recently-published papers.
While the mid-summer event can sometimes present uncomfortably-warm conditions for visitors to the campus research plots, this year's weather moderated enough to make the outdoor sessions tolerable, if not almost comfortable.
Much of this year's discussions centered on weed resistance to commonly-used herbicides and practical discussions on the applied science research being done within the University of California.
Original source (Reprinted with permission from Western Farm Press)
Lest we forget how valuable the customs procedures are at our ports of entry, look at this article from abc news:
These giant African land snails (article doesn't say, but very likely a species of the genus Achatina) are enormous, and can get up to 2 lbs in weight and according to the article are "seriously harmful" because they "eat any kind of crop they can get to". Good thing this shipment was stopped at the airport and came no further into our state, because quite frankly we aren't even close to having the tools to controlling these in an agricultural setting.
Giant African land snail. Imagine trying to manage something like this!
Weed resistance issues are nothing new for university researchers and the farmers they advise.
Nevertheless, science continues to partner with agriculture to find ways to address the challenges of herbicide resistance in crops like tomatoes, melons, and a host of other agricultural applications.
The popular Weed Day at the University of California stands as a shining example of such concern. For at least the last five years. The annual event has drawn a capacity crowd to address herbicide resistance to weeds impacting everything from rice to rangeland and row crops to trees.
The 58th annual Weed Day at UC Davis drew about 160 participants, according to university weed scientist and event Chairman Brad Hanson.
The purpose of the event is to draw people together to discuss the science related to weed control measures, Hanson said.
“Beyond the specific research that is presented at Weed Day, this serves as a great networking opportunity for many of us that work in weed control in California,” said Hanson.
One such topic of continual research is what Lynn Sosnoskie; an assistant project scientist at UC Davis is working on related to tomatoes and melons.
According to a paper written by Sosnoskie, Hanson, Seth Watkins and Oscar Morales with the UC Davis Department of Plant Sciences, several factors have combined to aid the proliferation of bindweed in processing tomatoes.
The change in planting practices from seeds to transplants, a reliance on mechanical harvesting, minimum tillage practices and a greater adoption of drip irrigation have not only helped processing tomatoes expand yields to over 45 tons per acre, but have aided in the proliferation of field bindweed.
Sosnoskie is studying herbicide-resistance issues in bindweed, a particularly troublesome weed in processing tomatoes and melons. It not only competes with the vegetable crops for water and nutrients, but in processing tomatoes can cause problems with mechanical harvest techniques.
“I'm just doing the work that Tom Lanini started here before he retired,” Sosnoskie said.
Sosnoskie has multiple tomato research trials on two field sites on the UC Davis Campus. The California Tomato Research Institute is sponsoring a study to evaluate field bindweed control in early- and late-planted processing tomatoes.
Part of her work includes dose-response experiments. This includes spraying bindweed with various rates of commonly-used herbicides that are licensed for commercial use in California and then watching the weeds in a greenhouse setting for signs of resistance.
These experiments are looking at post-emergent herbicides for their damaging effect on bindweed at various stages of growth in a greenhouse setting. The aim is to discover how application timing impacts the plant. Sosnoskie is in her second year of these studies.
She plans to publish her findings in Weed Science Journal by early next year.
Difficult to control
“I'm more of a biologist, so I like to look at how resistance management works,” she said.
According to Sosnoskie, bindweed is one of the worst weeds that can impact tomatoes, particularly once it becomes established. Bindweed is a deep-rooted, drought-tolerant perennial weed.
“It's very difficult to control at that point,” she said.
“It's also a problem in young orchard systems because it can impact the young trees,” Sosnoskie continued.
One of the things Sosnoskie discovered in her research is the timing of glyphosate applications is important in the control of bindweed. Still, she says it is not a simple weed to manage.
Starting with a clean field, particularly in melons and tomatoes, is vitally important at staying ahead of bindweed outbreaks, Sosnoskie continues. Burning down weeds, good tillage practices, and a good pre-emergent herbicide program can help farmers control weeds in these crops.
Based on research conducted from 2011-2013 on campus and at the UC West Side Research and Extension Center, Treflan PPI was determined to be “one of the most effective soil-applied treatments for suppressing established field bindweed in processing tomatoes,” according to a university research report.
For Hanson, the UC Davis Weed Day is a great place to address the problematic issues related to glyphosate resistance. Glyphosate- resistant crops have been released on the market, making it easier for weed control without damaging the crop.
Couple that with the declining price in glyphosate products after the formula went off-patent and Hanson said growers are more eager to liberally use the product.
A new mode of action to address the proliferation of glyphosate-resistant weeds is needed in herbicide control, Hanson said.
Aside from the resistance issues, which seemed to dominate this year's discussions, weed control in rangeland settings were also discussed. Participants toured the USDA-ARS Aquatic Weed Research Facility on the UC Davis campus.
Hanson was pleased with this year's event, saying that those attending represented an array of agricultural interests, including technical representatives from regional product distributors, UC Extension representatives including farm advisors and graduate students and representatives from various regulatory agencies including the California Department of Pesticide Regulation.
Original source (Reprinted with permission from Western Farm Press)