Weeds & Invasive Plants

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.

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.

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.

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.

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.

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.

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.

Be on the Lookout: Bulbous Bluegrass

Bulbous bluegrass is a resilient, invasive grass that can tolerate a wide variety of environmental conditions. Learn how to identify and manage it before it impacts forage production.

Vegetative Identification of Palmer Amaranth, Waterhemp, and Redroot Pigweed

Palmer amaranth is a non-native weed sharing common characteristics with waterhemp and redroot pigweed. Learn how to identify all three of these aggressive weeds before they become an issue in your fields this growing season.

June 20 Was the Last Day to Apply Dicamba Postemergence in Dicamba-Tolerant Soybean in South Dakota

The cutoff date to apply dicamba postemergence was June 20, 2023. Eric Jones, Assistant Professor and SDSU Extension Weed Management Specialist, shares some important updates now that the deadline has passed.