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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.

Pregnant black angus cow standing in a dry pasture.

High Nitrates and Pregnant Cows

Drought poses many challenges to the beef cow herd. Nitrates in feed is one of the challenges that producers need to be aware of, especially in the reproductive herd.

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.

Tan-gray Goss’s bacterial blight lesions were observed in scouted corn fields.

Goss's Bacterial Wilt and Leaf Blight of Corn

Fact sheet for identifying Goss’s bacterial wilt and leaf blight of corn, also known
as bacterial leaf freckles and wilt.

Oat leaf with very low crown rust.

Crown Rust of Oats

Fact sheet on Crown Rust of Oats for agronomist and growers.

sunflower field

Best Management Practices for Sunflower Production

This is your unbiased, research-based guide to sunflower production, providing the latest recommendations to help increase yield, reduce input costs and protect your investment.

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.

Canada thistle growing in a pasture.

Noxious Weeds of South Dakota

Pictorial reference guide of noxious weeds in South Dakota