Arkansas farmers seeing possible PPO-resistant pigweed

In Delta Farm Press

by Bob Scott, University of Arkansas Extension Weed Specialist

There is a scientific process that weed scientists go through before we declare a weed resistant to a given herbicide. It involves looking at the suspect weed in comparison to a known “non-resistant” biotype of the same weed, looking at various rates and making sure that the resistance is heritable. The heritable part is why we grow plants out for two seasons and make sure the progeny are just as resistant as the parents.

My research counterparts at the University of Arkansas Campus in Fayetteville are working on these tests right now for PPO-resistant Palmer pigweed in Arkansas. They are not quite done yet, although it is becoming very apparent in the field that it’s here and possibly in other Mid-South states.

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Using a Universal Pathway to Whack at Weeds

A U.S. Department of Agriculture (USDA) scientist in Oxford, Miss., is working toward developing new herbicides by focusing on a molecular pathway that not only controls weeds, but could have helped shape our nation’s history.

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