Blogging by the Bushel
With numerous challenges over the past several years for producers, we at Mercer Landmark understand the need for a comprehensive risk management solution. We seek to provide our customers with unparalleled service to ensure maximum results.

By~ Jeff Prickett

As I drive through the countryside I have come to the realization that waterhemp is going to be a real problem weed moving forward into 2018. I see waterhemp at various stages of development in most fields in and around New Weston to Coldwater and beyond.

There will be a tremendous amount of waterhemp seed that will be spread through combining this fall.

What can we do differently to manage waterhemp populations moving into 2018? One word – prevention. Scout and prevent waterhemp escapes in corn crop prior to rotating to soybeans.

Waterhemp typically is easier to control in corn as we have more effective post emerge herbicide choices.  Other key preventive measures for waterhemp control would include overlapping residual products in soybeans such as Valor XLT, Fierce XLT or Boundary herbicide down as a pre-emerge followed by an in-crop application of another residual product such as Warrant Ultra, Prefix or Charger Max.

Waterhemp escapes in soybeans can be somewhat effectively controlled if treated while the plants are small (less than 4”). Often times larger waterhemp plants treated with post emerge products such as Flexstar, Cobra and/or Liberty will re-grow from the lower nodes of the plant.

This may buy the soybean plant some time to outgrow the waterhemp plant, but more than likely the waterhemp plants will re-grow, cause yield reduction and still produce viable seed.

Other preventative measures to control waterhemp seed populations is to keep your wheat stubble fields clean of waterhemp flushes. Here is a picture I took earlier this week. As you can see, the waterhemp plants are short, but thick enough to produce thousands of seeds per acre. In this field, we treated with 40oz/acre of Brash plus 40oz/acre of Roundup PowerMax.

If you have any questions about mananging waterhemp or any other weed problems on your farm, please feel free to reach out to any of our agronomy team here at Mercer Landmark. We are here to help!

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