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Three poisonous rangeland plants. From left: Hemlock, Halogeton and Buffalo Bur.

Poisonous Plants on Rangelands: Hemlock, Halogeton and Buffalo Bur

Several species of poisonous plants are invasive and can easily establish dense stands when there is a disturbance on rangelands. Hemlocks, halogeton and buffalo bur can all be found throughout South Dakota and are toxic to livestock.

Low larkspur and twogrooved poisonvetch plants growing in rangeland.

Poisonous Plants on Rangelands: Larkspur and Poisonvetch

Larkspurs are the second leading cause for all livestock deaths from toxic plant poisoning. Poisonvetches are considered accumulator plants that uptake excessive levels of selenium and cause toxicity problems in cattle.

Two poisonous rangeland plants. Left: Woolly Locoweed.  Right: Lambert Crazyweed (Purple Locoweed).

Poisonous Plants on Rangelands: Locoweed and Crazyweed

Locoweed and crazyweed are found throughout South Dakota rangelands, and both can cause livestock poisoning.The names locoweed and crazyweed are often used interchangeably. However, there are notable differences between the species.

Three woody plants. From left: Ponderosa pine tree, chokecherry bush and greasewood.

Poisonous Plants on Rangelands: Woody Species

Several woody plant species that are poisonous to livestock are found throughout South Dakota rangelands, including ponderosa pine, chokecherry, greasewood and broom snakeweed.

Paul O. Johnson making notes about a field of corn

SDSU Extension to Tackle Weed, Pest and Drought Inquiries at State Fair

August 23, 2021

To address drought concerns, as well as weed and pest inquiries, South Dakota State University Extension will feature two booth locations at the 2021 South Dakota State Fair Sept. 2-6 in Huron.

harvester chopping corn silage, depositing silage into green wagon.

Video Series Offers Tips on Harvesting Failed Crops as Forage

August 24, 2021

To help producers navigate through these issues, SDSU Extension and the South Dakota Soil Health Coalition have recently released a new video series, “Salvaging Drought Stressed Crops.”

several small eastern red cedar trees growing in rangeland

‘Baa-d Cedars’ Field Day Examines Goat-Targeted Grazing on Cedars

September 17, 2021

South Dakota State University Extension invites the public to an interactive Eastern Red Cedar Management Field Day to see the impact goats can have in controlling the most widely distributed conifer across eastern North America.

Group of youth participants at rangeland and soil days.

38th Annual Rangeland and 17th Annual Soils Days Held in Murdo

August 16, 2022

SDSU Extension, along with the Jones County Conservation District and the South Dakota Natural Resources Conservation Service (NRCS), hosted the 38th Annual Rangeland and 17th Annual Soils Days June 14-15, 2022, in Murdo, South Dakota.

Muddy field with no residual forage exhibiting signs of extreme soil erosion.

Five Range Management Principles: #4 Residual Forage

Residual forage is the amount of green leaf left after a grazing event. Understanding its importance can help producers capitalize on the symbiotic relationship that occurs when soil health is front and center on rangelands.

Several red angus cattle feeding at a feed bunk.

Concentrated Animal Feeding Operations training to be held March 29

March 06, 2023

South Dakota State University Extension, the South Dakota Department of Agriculture and Natural Resources, and the Natural Resources Conservation Service are offering an environmental training session for operators of Concentrated Animal Feeding Operations (CAFOs) on March 29 at the Crossroads Convention Center, 100 Fourth St. S.W., in Huron.