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2026 Rangeland and Soil Days Contest brings 115 youth to Belle Fourche

June 30, 2026

South Dakota State University Extension is pleased to announce that 115 youth participated in the 42nd annual Rangeland and 21st annual Soil Days contests on June 9-10, 2026, in Belle Fourche.

Small shiny fly larvae with black heads on a brown plant root.

Fungus Gnats Affecting Soybean Emergence

We have recently received a report of a maggot attacking soybean seedlings. During most years, we would immediately expect this to be a case of seedcorn maggots, but it was fungus gnat larvae.

Circular holes in a green corn leaf. The holes are in a straight line.

European Corn Borer Caterpillars Are Active: Scout your conventional corn

European corn borer caterpillars have been observed in conventional corn at several locations. Indicators for presence of are a line of straight holes in the upper leaves that is often referred to as shot-hole injury.

Stable fly, face fly, and horn fly.

Fly Management for Cattle

There are several species of flies that can reduce the production value of livestock, particularly during hot, dry weather. To manage these pests, it’s important to be able to accurately identify them and understand their life cycles.

36 youth and about 10 adults wearing blue shirts sit and stand around the South Dakota flag

SDSU Extension 4-H youth compete well at national shooting sports event

July 13, 2026

South Dakota State University Extension 4-H youth brought home top honors from the 2026 4 H Shooting Sports National Championships on June 21-26, 2026, in Grand Island, Nebraska.

Sunny sky over pasture at the Cottonwood Mesonet station.

Considerations for Pasture and Herd Health in a Mixed-Precipitation Year

Planning for drought can quickly be replaced with a false sense of security when precipitation does arrive in the middle of the growing and grazing seasons, but the long-term sustainability of your pastures and herd depends on timely, flexible management.

Three wheat fields exhibiting wheat streak mosaic virus symptoms throughout.

South Dakota Wheat Streak Mosaic Virus Disease: 2026 Update

Wheat streak mosaic virus is on the move across South Dakota wheat fields. Due to the mild winter and overwintering in winter wheat, viral activity has had a jump start in 2026, and the occurrence and intensity of disease pressure is comparable to the 2025 season.

A collection of empty pesticide and herbicide containers.

Herbicide Group Classification

The intent of providing herbicide group numbers and mode/site-of-action information on labels is to help develop herbicide plans that reduce the selection pressure on herbicide-resistant weeds. Learn how understanding this information can help improve your plans.

Green beetle larvae with a white stripe running down its body.

Alfalfa Weevil Activity Prediction Update: May 9, 2024

Although May hasn’t been extremely warm, the accumulated degree days in South Dakota since January 1, 2024, suggest that alfalfa weevil larvae could be active in several areas of the state.

Seecorn maggot larva feeding on a seed in a field.

Seedcorn Maggot Degree Day Activity Estimates: May 9, 2024

With the cool, wet start to the 2024 season, it is important to consider the possibility that seedcorn maggots could cause issues for crop seedlings