Weeds & Invasive Plants

All Weeds & Invasive Plants Content
Common ragweed and kochia growing along a road ditch.

Late-Season Weed Management

At this time during the growing season, many herbicides cannot be applied to crops in the reproductive growth stage. However, weed management can still be implemented. Learn some expert tips for controlling late-season weeds.

Yellow wheat field with green weeds throughout.

At-Harvest and Post-Harvest Weed Management Tactics in Wheat

Many pre and postemergence herbicides did not adequately control weeds during the 2023 growing season due to early dry and hot conditions. Despite the poor control, there are still options to implement at-harvest and post-harvest to help manage weeds.

Green soybeans with a few green weeds throughout.

The Value of a Preemergence Herbicide After a Dry Period During the Growing Season

Preemergence herbicides are an essential component of weed management, even when early season weather isn't cooperative. Learn about some of the benefits they can offer following a dry growing season.

Satellite image of a well-planned prescribed burn unit.

Utilize Targeted Grazing for Firebreaks

Targeted grazing incorporated into an overall rotational grazing plan can be an excellent strategy to reduce an area's available fuel load and create a soft, or green, firebreak.

Tractor spraying soybean.

Herbicide Resistance Detection in the Field

Have you noticed weeds surviving a typically lethal herbicide application? There’s a chance they’ve developed herbicide resistance. Learn some expert tips for detecting and confirming resistance in fields.

Kristine Lang and Rhoda Burrows look at some plants with two men inside a high tunnel

The South Dakota State University Southeast Research Farm to host Field Day on July 11

June 30, 2023

The South Dakota State University Southeast Research Farm Field Day will be held on July 11 near Beresford, South Dakota.

Ventenata grass aggresively spreading throughout rangeland.

Be on the Lookout: Ventenata

Ventenata is an invasive annual grass that's an emerging threat to South Dakota rangelands due to its ability to exclude desired native species. Learn how to identify, report, and manage it before it becomes a problem in your area.

Soybean field in early summer.

Dicamba Cannot Be Applied Postemergence in Dicamba-Tolerant Soybeans After June 20. Now What?

While you may have purchased dicamba to use in soybeans, applying it past the deadline is illegal. Learn about some other viable postemergence herbicide options for soybeans now that the deadline has passed.

Three green plants that showcase A) waterhemp, B) redroot pigweed, and C) common lambsquarter.

Weeds Have Started to Flower!

Early-flowering waterhemp, redroot pigweed, and common lambsquarters show the importance of early weed control, as they can produce seeds before a delayed postemergence herbicide application.

Dense patch of brown, Medusahead grass on rangeland.

Be on the Lookout: Medusahead

Grassland managers are encouraged to be on the lookout for Medusahead, an invasive grass that can aggressively out-compete native species. Learn how to identify, report, and manage it before it becomes an issue.