Category: Weeders of the West
Herbicide Mixtures for Resistance Management? Well, It Is Complicated!
If you have ever listened to any presentation or read any scientific, extension, or fact sheet on herbicide management, chances are that you would have…
Distribution of ALS‐Resistant Downy Brome Populations in Eastern Oregon
Downy brome (Bromus tectorum L.) is a difficult-to-control winter annual weed species in the dryland winter wheat fields of the Pacific Northwest.
Herbicides Are NOT The Solution
Many growers are looking to the agricultural chemical and seed industries for solutions to herbicide resistance in weeds. While I do not have a crystal…
Christmas Tree Weed Control – Developing New Herbicides
Oregon leads the United States in the production of Christmas trees, with almost 8.5 million trees sold in 2015. Weed control is essential in Christmas…
Palmer Amaranth is Lurking in Fields in the Pacific Northwest: Is it in Your Field?
On April 21, 2022, I wrote an article for this blog titled ‘Watch out for Palmer amaranth in the Pacific Northwest’ based on anecdotal evidence…
Clearing the Waters About Water
Let’s take a moment and clear the waters a bit about water.
What is The Value of Weed Biology Research to Applied Management?
I finished graduate school at WSU in the spring of 2017. Just last week, a weed science team from WSU (Ian Burke, Drew Lyon, Frank…
Waterhemp Is Here, Is Palmer amaranth Next?
When I took my current job at the University of Idaho about two years ago, one of my fears was that Palmer amaranth, one of…
Aggressor (quizalofop) Herbicide Application Timing
You may have heard about the importance of the timely application of herbicides, or maybe even experienced it yourself. With the new CoAXium wheat varieties…
The Reemergence of Preemergence Herbicides
Since the introduction of Roundup Ready crops in the mid- to late-1990s, postemergence herbicides have played an increasing role in weed control for many crops…
Developing New Herbicides to Manage Kochia in Hop Yards
Kochia (Bassia scoparia) is a severe weed problem in hop yards in eastern Washington and Idaho. This annual weed is an erect, herbaceous bush-type plant…
Watch out for Palmer amaranth in the Pacific Northwest
As I write this article, the 2022 cropping season is in full swing in the Treasure Valley of southwestern Idaho and eastern Oregon. Onions have…
Looking Critically at Harvest Weed Seed Control: What Benefits Can be Realized in PNW Dryland Cropping Systems?
Harvest weed seed control has been a popular topic at grower’s meetings this winter and a few early adopters in the PNW are experimenting with…
New Herbicide Registration for Kentucky Bluegrass Seed Production in Oregon
For the 2022 growing season, Kentucky bluegrass (KBG) seed growers in Oregon will have access to sulfosulfuron (Outrider, from Valent USA) through a recently approved…
Herbicide Resistance is for the Weak: A Message From Common Lambsquarters
Whether you drive north, south, east, or west, chances are that you will see quite a number of fields infested with common lambsquarters. This weed…
Understanding Weed Competition Below Ground
In the semi-arid region of inland Pacific Northwest (PNW), Russian thistle (Salsola tragus), kochia (Bassia scoparia), and prickly lettuce (Lactuca serriola) are three important weed…
I Can’t Say This Enough!
When it comes to delaying the development of herbicide resistance in weeds, herbicide mixing and rotation are critical. In an earlier blog post titled, “Two…
Reminders for Spring Postemergence Herbicide Applications in Wheat for Grass Weed Control
With flooding rains occurring and snow falling in some areas of our region this week, it may be difficult to envision making spring postemergence herbicide…
Tiafenacil, A New Herbicide in Grapes
Tiafenacil (Gamma, Helm Agro) is now labeled in wine grapes in Oregon, Washington, and Idaho. Tiafenacil is a non-selective postemergence herbicide controlling broadleaves and grasses.…
Effects of Herbicide-Resistant Weeds in a Warming Planet
We are going to discuss herbicide resistance in weeds yet again, but with a slight twist! Have you wondered what would be the combined effects…