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Paul O. Johnson

SDSU Extension Weed Science Coordinator


Berg Agricultural Hall 229
Agronomy, Horticulture & Plant Science-Box 2207A
University Station
Brookings, SD 57007

Paul serves the citizens of South Dakota as the SDSU Extension Weed Science Coordinator based on the campus of South Dakota State University in Brookings. 

State & Regional Offices

SDSU Campus

Also by Paul O. Johnson

Canada thistle growing in a pasture.

Noxious Weeds of South Dakota

Pictorial reference guide of noxious weeds in South Dakota

Crop sprayer and a bottle of chemicals in a yard.

Read the Label

Last year, Bayer announced they would be phasing out glyphosate from the homeowner market, but they would be keeping the Roundup name for future marketing. Learn some important label considerations when purchasing Roundup-branded products.

Four common spring weeds: Shepherd’s Purse, Catchweed Bedstraw, Waterpod and Henbit.

Spring Annual Weeds

There are several weeds that pop up very early in the spring and start flowering before most other plants have shown any signs of growth. Learn about some common varieties to look out for.