Weeders of the West

In this article, Oregon State University's Joel Felix shares that while Amaranth is considered weedy, some members are grown ornamentally as well as for grain and/or as a green vegetable.

University of Idaho's Doug Finkelnburg shares the results of the Pacific Northwest Problem Weeds Survey.

A new contributor to the Weeders of the West forum, Dr. Rui Liu shares knowledge about Russian thistle commonly found in the U.S.

Albert T. Adjesiwor with the University of Idaho shares why weeds are so hard to eliminate and recent research into weed seedbanks.

Oregon State University's Fernando Oreja and Judit Barroso share their research into reducing Russian-thistle dispersion post-harvest.

To till or not to till...that is the topic of this discussion. We invite you to share your insights and opinions!

Contributed by Oregon State University's  Ryan Hill and Marcelo Moretti, this post shares their studies of the effects of glufosinate to understand how to better protect young trees from herbicide injury.

It is believed that human/weed interactions accelerated at the inception of agriculture! Prior to 1996, weed control in some crops was a major challenge. There was a running joke in the 80s and 90s...

Good news everyone! Pacific Northwest land grant universities and three regional USDA-ARS units are launching a new Herbicide Resistance Initiative! Our goal is nothing short of creating a coordinated, interdisciplinary, systems-based approach to managing herbicide...

Wild carrot, or Queen Anne’s lace, is a widespread and difficult to control nuisance weed across most of western Oregon. It is prolific in roadsides, poorly managed pastures, post-harvest forestry sites, and other areas with...

When I arrived on the Palouse in June 2021 to take over for Dr. Katie Dentzman on a project looking at community-based management of herbicide resistance, I didn’t know much about agricultural production, weed ecology...

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 heard about the use of herbicide mixtures for resistance management.

Downy brome (Bromus tectorum L.) is a difficult-to-control winter annual weed species in the dryland winter wheat fields of the Pacific Northwest.

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 ball, my understanding of the problem tells me that 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 trees to reduce competition for moisture and nutrients, allow fast...

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 centered on a photograph taken in Weiser, ID. Then...

Let’s take a moment and clear the waters a bit about water.

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 Young, Samuel Revolinski, and myself) finally got official acceptance of...

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 the most troublesome weeds in agricultural production systems will be...

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 resistant to Aggressor (quizalofop), the question about when Aggressor should...

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 including corn, soybean, cotton, and wheat. The introduction of Maverick...

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 reaching over 6 ft in height if unmanaged. Its deep...

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 already been seeded and emerged in some fields! Other crops...

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 this new (to us) technology. While chaff lining, tram lining...

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 24(c) Special Local Need registration, EPA SLN No. OR-220002. This...