Forage
All Forage Content
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.
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.
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.
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.
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.
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?
Survey of Grasshoppers in South Dakota
Fact sheet on the abundance and species diversity of grasshoppers in South Dakota
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.
Alfalfa Weevil Populations Rapidly Increasing in Western South Dakota and Starting to Show up in Eastern South Dakota This Week
Recent degree day accumulations for alfalfa weevils in western South Dakota would suggest that alfalfa weevil larvae activity should be wrapping up for the 2025 season. However, recent scouting of alfalfa suggests otherwise.
Alfalfa Weevil Activity Prediction Update: May 29, 2025
The lowest calculated degree days in South Dakota indicate that fourth instar larvae should be active, while the highest calculated degree days suggest that pupation is occurring in the field.