- Author: Giuliano Carneiro Galdi
- Posted by: Gale Perez
Roundup Ready technology incorporates genetic resistance to glyphosate into crops and it's an excellent tool for weed control. Initial screening in the early 2000s found good alfalfa crop safety, and many growers currently rely on glyphosate as the only herbicide. Although using the same herbicide over and over is not a good idea because it may accelerate herbicide resistance in weeds, Roundup Ready alfalfa has been successfully used with few to no concerns regarding crop safety. However, the combination of glyphosate and cold weather may cause crop injury, especially in certain regions.
The problem was first observed in 2014 by Steve Orloff, former UCCE farm advisor in Siskiyou County. A Roundup Ready alfalfa field showed...
- Posted by: Gale Perez
Here's the latest issue of the UC (ANR) Cooperative Extension Lassen County Farm Advisor's Update newsletter:
November 2020 contents:
- Is Irrigating Alfalfa After Last Cutting a Good Idea?
- What To Do When an Animal Dies? Composting Could Be the Answer
- Blue Alfalfa Aphids Management
- The Continued Saga of Injury to Roundup Ready Alfalfa Following Applications (page 5)
- Tips for Maximizing Wheat and Barley Yields
- Author: Thomas Getts
Over the past two seasons I have been involved with testing an experimental herbicide for weed control in alfalfa. There was an initial trial implemented at the Intermountain REC in Tulelake California during the 2019 growing season. The main goal of the trial was to test crop safety of an experimental herbicide on alfalfa where applications were made between cuttings. As I was already putting a trial out, it seemed worthwhile to test various other treatments for comparative crop safety. (Some of the treatments tested are registered for use between cuttings, others are not. Both registered and unregistered products were tested. Always read and follow the label whenever using a pesticide).
However, this blog post is not going to...
- Posted by: Gale Perez
The February 2019 issue of the Farm Advisor's Update by Tom Getts (Weed Ecology and Cropping Systems Advisor) is out.
Contents:
- Winter Annual Weed Control in Alfalfa (Avoiding Crop Injury with Roundup)
- Purple Flowers, Pokey Leaves and Deep Roots: Canada Thistle Control Trial
- Update: Scotch Thistle Control in the Spring and Fall
http://celassen.ucanr.edu/newsletters/Farm_Advisors_Update78846.pdf
- Author: Thomas Getts
- Author: Rachael Freeman Long
- Author: Lynn M. Sosnoskie
- Author: Mariano Galla
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The old saying, “Everything's fine until it's not,” comes to mind when dealing with some tough to control perennial weeds in alfalfa production during the summertime. Such was the case for an alfalfa field in the Sacramento Valley, where weed control seemed good up until mid-summer, and then it wasn't. Perennial weeds that started off small and overlooked, grew through the season, persisting through multiple cuttings, including curly dock, plantain, and nutsedge. For tough to control weeds in alfalfa fields, one needs to determine: 1) What types of perennial weeds are present, and 2) How many of them are there, to make a decision on how to manage them. These sorts of weed issues can creep up quickly in older alfalfa...