Weeds & Invasive Plants

All Weeds & Invasive Plants Content

grass with field bindweed, a viny green weed with white flowers

Weed Control: Noxious Weeds

Weed control recommendations for noxious weeds in South Dakota.

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.

A herd of cattle gather around a stock pond on a vast, lush grassland. Courtesy: USDA [CC BY 2.0]

Weed Control: Pasture and Range

There are many undesirable plants or invasive plant species in South Dakota's 24 million acres of native and tame pasture range. This guide provides a summary of different herbicide suggestions and uses.

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

Gloved hands examining a musk thistle seedhead.

Now is the Time to Plan for Noxious Weed Control in 2026

Most of South Dakota experienced first frosts that were delayed by at least one month, allowing for noxious weed growth to continue later in the season. Now is the time to plan for noxious weed management tactics.

Snow-dusted, harvested field with a few scattered plants throughout.

Now is the Time to Prepare Your Weed Management Plan for the 2026 Growing Season

As harvest season comes to an end, now is the time to start formulating your weed management plan for next year. Learn some expert tips for getting your operation off to a good start this coming growing season.

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

Examples of Wild violet, Creeping Bellflower, and Ground Ivy growing on a lawn.

Perennial Weed Control in Lawns and Turf With Fall Herbicide Applications

Early fall is great time to control perennial weeds in lawns, including Wild violet, Creeping Bellflower, Ground Ivy, and Canada Thistle. Learn some expert tips selecting the right herbicides to manage these difficult-to-control weeds this fall.

Yellow toadflax plants flowering in a grassy area beside a field.

Yellow Toadflax Has Begun Producing Seeds: Scout before treating infested areas

Yellow toadflax is a perennial weed that infests pasture and rangeland across South Dakota. This year, with an abundance of heat and moisture, plants flowered in early August and now have started to produce seeds.

Gardeners browsing a tablet computer while visiting a garden center.

Home Horticulture Resources for Gardeners

Horticulture is the branch of plant agriculture dealing with garden crops. In addition to our website, there are many horticulture resources available on the web to provide research-based information to help every gardener succeed.