Crop & Pest Report


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Scout for Waterhemp in Sugarbeet (06/02/16)

Most areas in the sugarbeet growing region received precipitation last week.

Scout for Waterhemp in Sugarbeet

Most areas in thewdsci.peters.1 sugarbeet growing region received precipitation last week. However, soil-applied herbicides applied early postemergence for waterhemp control in sugarbeet laid on the soil surface up to 14 days before activation in some cases. Scout fields for waterhemp escapes and take a proactive and aggressive approach to control them, especially when waterhemp is small.

Small weeds (less than 3 inches) are more susceptible to herbicides than large weeds. Even weeds with a low level herbicide resistance are more susceptible at 1 inch than at a larger growth stage. Apply glyphosate at full rates with effective herbicides tank-mixes and adjuvants to control waterhemp.

The following table is a summary of multiple experiments targeting waterhemp control from glyphosate alone and glyphosate in mixtures in sugarbeet. Herbicide treatments were repeat application targeting two to three inch waterhemp.


Waterhemp is a tough to control weed in sugarbeet, especially resistant populations. Best opportunity for control is small weeds, full glyphosate rates and a tank-mix strategy that includes ethofumesate, Betamix and/or UpBeet.


Tom Peters

 Extension Sugarbeet Agronomist

NDSU & U of MN

This site is supported in part by the Crop Protection and Pest Management Program [grant no. 2017-70006-27144/accession 1013592] from the USDA National Institute of Food and Agriculture. Any opinions, findings, conclusions, or recommendations expressed are those of the website author(s) and do not necessarily reflect the view of the U.S. Department of Agriculture.

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