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Gared Shaffer

SDSU Extension Weeds Field Specialist

605-626-2870

SDSU Extension Aberdeen Regional Center
13 2nd Ave SE
Aberdeen, SD 57401

Gared supports the citizens of South Dakota in his role as an SDSU Extension Weeds Field Specialist based in Aberdeen.

Also by Gared Shaffer

Kochia growth spreading amongst a patch of soil.

The Fall Advantage of Kochia Control

Kochia is a problem in row crops in North Central South Dakota. New Post-emergent options in corn and soybean have helped alleviate Kochia competition from many fields, but these herbicide options shouldn’t be completely relied upon for a long-term plan for control.

A sprayer applying pre-emergent pesticide to a bare field.

Herbicide Rotation Restrictions

This is a quick reference guide to common herbicides and their rotation restrictions for selected crops.

Two groups of cover crops. Left: Oats. Right: Radish.

Herbicide Interactions With Cover Crops After Oats

After oats have been harvested, options exist to keep a living root in the soil. This can be done through growing cover crops. In 2018 an on-farm trial was preformed near Salem, South Dakota to observe how cover crops grown after oats would germinate after common herbicides had been applied.