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Paul O. Johnson

SDSU Extension Weed Science Coordinator

605-688-4591

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

Yellow wheat field with green weeds throughout.

Weed Control Field Test Data

Data books to use as a reference to select appropriate herbicide(s) for row crops

Canada thistle growing in a pasture.

Noxious and Pasture Weed Plot Data Report

Data books to use as a reference to select appropriate herbicide(s) for noxious and pasture weed

sun rising over South Dakota field

South Dakota Pest Management Guides

The South Dakota Pest Management guides are now available for free. The guides offer recommendations for controlling weeds, insects, and diseases in a variety of South Dakota crops.