Forage

All Forage Content

Green Canada thistle with whitened leaves at the top. Various green plants throughout.

White Thistle Disease: Biological management at work

White thistle disease can be seen among many Canada thistle plants throughout South Dakota this growing season. Plants infected with the disease exhibit significant reductions in both growth and seed head compared with non-infected plants.

A field of flowering alfalfa.

Nitrate QuikTest for Forages

The Nitrate QuikTest for Forages is available at various SDSU Extension locations and veterinary clinics across the state and is designed to be used with standing forages prior to harvesting for hay or grazing.

Gray beetle on a green alfalfa plant with purple flowers.

Watch for Blister Beetles in Later Alfalfa Cuttings

The frequent rain events experienced this summer has helped boost forage production. Although this is great for growers, the possibility of encountering blister beetles at harvest increases later in the summer.

Hail-damaged soybean field with storm clouds in the background.

Making Decisions With Hail-Damaged Row Crops

Late-season hail damage can leave growers wondering what to do next. Before deciding what to do with your hail-damaged fields, take some time to consider a variety of management options.

A picture of producers (ranchers) in a rangeland pasture looking into another pasture that has different forage biomass quantities. The

Systems Thinking for Agriculture: A tool for addressing complex ranch problems

A systems approach to management encourages producers to take multiple factors into consideration to solve problems within their agricultural operation.

A photo of a winter grazing pasture with a variety of grasses, shrubs and forbs that was taken at the SDSU Cottonwood Field Station that contains some field pennycress.

2025 Field Pennycress Management Considerations

Field pennycress prevalence on pastures has been observed to be in higher abundance this year in Western South Dakota. When consumed in certain quantities it can be toxic to livestock.

Green plant with bright yellow flowers throughout.

Leafy Spurge: Do I spray now or wait until fall?

In June, leafy spurge is one of our most problematic rangeland, pasture, and roadside weeds. It is also one of South Dakota’s noxious weeds that landowners are required by law to control. So should you spray it now or wait until fall?

Redlegged and differential grasshopper nymphs.

Grasshoppers Are Showing up in Large Numbers in Eastern South Dakota

While scouting spring wheat in Brookings County this week, we noticed grasshopper nymph populations that were close to threshold.

Grasshopper with red hind tibia. It’s sitting on a green grass stem.

Survey of Grasshoppers in South Dakota

Fact sheet on the abundance and species diversity of grasshoppers in South Dakota

Green aphid with red eyes and cornicles with black tips.

Monitor Alfalfa for Pea Aphid Activity

Pea aphids can cause yield reductions to alfalfa when large populations are present. Prolonged feeding by these populations can even cause the alfalfa fields to take on a “golden” color.