Palmer amaranth – current state-level distribution in the US

Palmer amaranth is native to the southwestern United States, and has been recognized as a problematic weed in the southwest and southeastern US for many years. Each year, this species seems to move further north. I’ve been trying to keep an accurate state-level distribution map for this weed, and thought I’d post it here for anyone else who might be interested.   Data sources: PLANTS database (https://plants.usda.gov) California, Nevada, Utah, Arizona , Colorado, New Mexico, Nebraska, Kansas, Oklahoma, Texas, Wisconsin, …

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Remembering Gustavo

This has been a difficult year. One year ago, I learned that my best friend had died in a motorcycle accident. He was traveling to a meeting in California – a meeting that I was also attending. I found out about Gustavo’s passing just a few seconds before the flight attendant made me put my phone into airplane mode. I was alone, without the ability to communicate, and I’d just been told I would never again get to see the …

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Cotton growers continue to battle herbicide-resistant Palmer amaranth

A new press release from WSSA was released a few days ago. The post is related to my recent post on cotton yields in the South. From the WSSA piece: “The current model simply isn’t sustainable,” says Stanley Culpepper, Ph.D., a professor in crop and soil science at the University of Georgia and member of WSSA. “Growers have gone to war, and they are making progress from a weed management perspective, but not from an economic or environmental perspective. We …

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