Proper pigweed identification vital to control

Published on: 18:44PM Feb 24, 2016

Differentiating waterhemp from other pigweed species, such as Palmer amaranth, can help growers plan the most effective weed management program. That’s because certain species respond differently to different control methods.

Identifying pigweed species correctly can be troublesome because the weeds look similar in their early growth stages, says Jeff Ellis, Ph.D., field scientist, Dow AgroSciences. Waterhemp, for example, has cotyledons that often are more egg-shaped than other pigweed species. Its leaves generally are longer and more lance-shaped.1

If waterhemp was hard to manage in your fields last season, there is a good chance it will be an issue this year. Early spring is an ideal time to scout fields and identify existing weeds that could threaten yield potential. It’s also a good time to re-evaluate your herbicide program to avoid weed escapes in the future.

Control high-anxiety weed species, such as waterhemp and Palmer amaranth, by using a preemergence, residual herbicide. Sonic® herbicide has two modes of action to effectively control weeds and protect yield potential.

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1Nordby, D., B. Hartzler, and K. Bradley. 2007. Biology and Management of Waterhemp.


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