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Weeds & Invasive Plants

All Weeds & Invasive Plants Content

Early germinating rosettes of common mullein and houndstongue.

Common Mullein and Houndstongue Have Germinated in the Black Hills and Surrounding Areas West River

Two biennial species, common mullein and houndstongue, have germinated and begun to grow in the Black Hills. Now is the time to scout and determine where areas need attention to manage these species and other weeds.

Bull thistle, Canada thistle, and absinth wormwood emerging in early spring.

Noxious Weeds Have Germinated in East River South Dakota

Seasonal conditions have been favorable for weed germination, including biennial thistle, Canada thistle, and absinth wormwood. Learn some tips for scouting, identifying, and managing these noxious weeds before they become a problem.

Scattered weeds emerge from a no-till corn field in Kennebec.

Watch Temperature Forecast Before a Burndown Herbicide Application

As planting season approaches, no-till fields will likely need a burndown herbicide application to manage the established winter annual and early emerging summer annual weeds.

Farmer inspecting a no-till field before planting.

Early Preplant or Preemergence Applications for Weed Management in Corn: Which is better?

Preemergence herbicides should be a part of a successful weed management plan, as these applications limit the amount of early-season weed interference to limit yield loss and reduce selection pressure on herbicide-resistant weeds.

Atrazine carryover injury to eastern redcedar seedling

Herbicide Carryover and Planting Bare-Root Tree Seedling in New Windbreaks

Guidelines on herbicide carryover when planting bare-root tree seedlings in new windbreaks

soybean pods

2,4-D (Enlist One) and Glufosinate (Liberty) Additively Control Common Weeds in South Dakota Soybean Production

Fact sheet on the experiment to determine how 2,4-D and glufosinate, when applied alone or mixed, control common weeds and affect soybean yield.

Pasture contaminated with Eastern Red Cedar

Pasture Attacker: Woody Plants are Robbing Your Forage Production

Traditionally, the prairie is home to herbaceous vegetation, such as grasses and broadleaf plant species. Although many woody plants are naturally present in canyon, riparian, or river areas, they are not meant to be a part of the grassland landscape.

Grassland with a large amount of dried brush and fuel for burning.

Removing Young Trees From Grasslands Will Save Money and Effort

Volunteer trees can hinder the development of desirable wildlife habitat and livestock resources. Early control of volunteer woody species is the simplest and most cost-effective option for maintaining open grassland habitats.

Monarch butterfly collecting pollen on a blazing star plant.

Understanding the Critical Role of Broadleaf Pollinator Plants in Pastures

Understanding the economic role of pollinators is the first step towards understanding their value to grassland and crop systems.

Rancher surveying pasture in an offroad vehicle.

Use Caution When Fall Spraying Noxious Weeds in Pastures To Avoid Harming Desirable Plants

Noxious weed control is often a long-term process. In some cases, chemical application may be deemed necessary, but it should always be considered in the context of appropriate management and an integrated best management framework.