Palmer Pigweed Resistance – Keys Behind the Evil Genius Sep 18, 2019

🕔Sep 18, 2019
Palmer amaranth’s resistance to PPO-inhibiting herbicides, a group of chemicals that disrupt chlorophyll synthesis, is especially problematic with glyphosate already out of the picture. Farmers had been turning to PPO-inhibitors […]

Glyphosate-Resistant Pigweed – 14 Years and Counting – DTN Feb 1, 2019

🕔Feb 1, 2019
It’s been 14 years since Stanley Culpepper confirmed the country’s first glyphosate-resistant Palmer amaranth population in some cotton fields in Macon County, Georgia. The University of Georgia Extension weed scientist had been seeing the […]

Tennessee: Signs and Symptoms of PPO Resistance – Video Jun 6, 2017

🕔Jun 6, 2017
Larry Steckel travels to the Mississippi River bottom – Ground Zero for Tennessee weed resistance. Watch the first in a series on management of resistant Palmer amaranth.

Herbicide Resistance: Dicamba Not Effective on Some Pigweed Populations, Says Study May 5, 2017

🕔May 5, 2017
Last summer, researchers with University of Arkansas and University of Tennessee found several populations of palmer pigweed that showed tolerance to dicamba and mesotrione in addition to resistance to glyphosate […]

Illinois: Glyphosate-PPO Cross Resistance Confirmed In Plenty Of Palmer, Waterhemp Jan 19, 2017

🕔Jan 19, 2017
Glyphosate and PPO inhibitor Summary: 593 field samples representing approximately 2,000 waterhemp or palmer amaranth plants were tested for herbicide resistance at the University of Illinois Plant Clinic in the […]

Illinois: PPO Resistant Palmer Pigweed Confirmed in State Oct 14, 2016

🕔Oct 14, 2016
Weed control in Illinois is about to get a little tougher for some farmers. Researchers in the state have announced they’ve found PPO inhibitor resistance in some fields of Palmer […]

Alabama: PPO Resistant Pigweed Likely Present in Northern Areas Sep 14, 2016

🕔Sep 14, 2016
Timely recommended applications of Flexstar GT (fomesafen + glyphosate) did not control Palmer amaranth in a closely monitored field in North West Alabama (Lauderdale County).  A herbicide strip trial for Palmer […]

Midwest: PPO Resistant Pigweeds on the Rise Aug 10, 2016

🕔Aug 10, 2016
PPO resistant pigweeds are increasingly more common in the cornbelt as we rely more on these herbicides for weed management in soybean. Using integrated weed management tactics that include effective […]

Indiana: Confirmations of Resistant Waterhemp, Pigweed Continue to Rise Aug 5, 2016

🕔Aug 5, 2016
The occurrences of failed control of waterhemp and Palmer amaranth with postemergence herbicides has continued to increase during the 2016 field season in Indiana. The Purdue Weed Science Group (with […]

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