PPO-resistant pigweed, ragweed will be a major concern in 2016

In Southeast Farm Press

North Carolina State University Extension Weed Specialist Wes Everman has continually issued warning bells that resistance to PPO inhibitors is a real concern for North Carolina farmers. It is a message he will continue to deliver in 2016.

Speaking at the 2015 fall convention of the North Carolina Agricultural Consultants Association in Raleigh Dec. 4, Everman said PPO-resistant palmer Amaranth has been confirmed in Tennessee and Arkansas. “I’m pretty confident we have it in Palmer here. And we’re most of the way down the road toward confirming it in ragweed here as well,” he said.

Even though there is suspected resistance to PPO inhibitors, Everman stressed that it is critical to keep the technology in the mix, and on the majority of soybean acres in North Carolina PPO-inhibitors will still work. “We are going to need to protect these technologies,” he said.

PPO-inhibitors have a place in late burn down applications in soybean production, Everman noted. However, farmers need to include residual herbicides as a part of their weed control program.

“You can apply dicamba and 2, 4-D right up to planting. It extends that window for late burn down. We still really don’t want to be spraying big weeds. You need to get them small. They are easier to control when you get them small. When you get some size to them, they are going to be difficult to manage,” he said.

Everman said a good pre-emergence program provides good residual control of palmer Amaranth in soybeans. A good tank mix is critical, he said, and it is important to include dicamba as part of the mix.

Read the rest of the story in Southeast Farm Press.

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