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Home » Authors » Albert Adjesiwor
Albert Adjesiwor

Albert Adjesiwor

Extension Weed Management / University of Idaho Kimberly Research and Extension Center
Email Albert Adjesiwor
Articles

ARTICLES

Palmer amaranth is becoming a serious threat in the Pacific Northwest

Palmer amaranth is rapidly spreading in the PNW, with widespread herbicide resistance. Effective control requires layered herbicide programs, managing escapes and integrated practices to prevent yield loss and long-term infestations.
April 7, 2026
Albert Adjesiwor

Palmer amaranth continues to pose a serious and growing challenge to crop production systems in the Pacific Northwest (PNW). As of the fall of 2025, there have been more than 160 Palmer amaranth detections in PNW, affecting 9,000 acres of cropland in Idaho and nearly 700 acres in Oregon.


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Weeds in my hay? How unwanted guests in alfalfa may affect forage quality

How alfalfa stands compete and sometimes struggle against weeds.
July 17, 2025
Albert Adjesiwor and Chandra Montgomery

That green field of alfalfa might look lush from the roadside – but what’s lurking in the mix could be quietly reducing your forage quality, lowering animal intake and even risking nitrate toxicity. Learn which weeds do the most damage, how they impact feed value and what you can do to protect your first cutting and your herd.


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Managing wild oats: Winning the war in your small grains

Wild oats are a persistent threat in small grains, producing up to 250 seeds that can survive for years. By staying vigilant, using diverse control strategies and thinking ahead, you can manage wild oats and safeguard your crop yields.
May 16, 2025
Albert Adjesiwor

Wild oats (Avena fatua) – they’re fast, sneaky and persistent. If you’re a small-grain producer, you already know this grassy weed can rob you of yield, quality and profits. But here’s the good news: With smart strategies, you can turn the tables.


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Weeds are coming for their pound of milk

September 29, 2021
Albert Adjesiwor
If you have ever driven through southern Idaho in the summer, you will notice there is alfalfa and corn everywhere. Knowing weeds would almost always be present in crops, the question hay producers often ask is: Should we harvest the weeds? How much weed biomass is too much? We know weeds are bad for farm animals, but is there a tipping point? The short answer is: I don’t know. 
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