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Paul O. Johnson giving a presentation near a research plot.

Paul O. Johnson Retires After Dedicated Career in SDSU Extension

June 08, 2022

Paul O. Johnson, SDSU Extension Weed Science Coordinator and Northeast Research Farm Coordinator, is retiring after a dedicated 33-year career supporting the people of South Dakota in his role at SDSU Extension.

Oat leaves covered in orange pustules.

Crown Rust of Oats

Crown rust continues to be the most economically damaging and important fungal diseases of oats in South Dakota. Learn how to recognize and manage it in oat fields this growing season.

Blades of green wheat in a wheat field.

Scouting Wheat Fields

Scouting is the process of monitoring fields and crops during a growing season. It can provide producers with field specific information on pest pressure and crop injury.

green soybeans with white mold

White Mold Development: Is your soybean field at risk?

According to USDA-NASS crop progress report for the week of July 17, 49% of the soybeans in South Dakota are at flowering. The flowering growth stage is also the time when white mold infection is initiated. The white mold pathogen infects the soybeans through the flowers that are senescing after pollination.

A close up of prickly Russian thistle

Prickly Russian Thistle

Publications that provide introductory and expanded information on the notorious invasive plant, prickly Russian thistle.

Barley yellow dwarf developing in winter wheat.

Barley yellow dwarf is starting to develop in winter wheat. Barley yellow dwarf is caused by the Barley yellow dwarf virus (BYDV). This disease usually becomes more distinct at flag leaf emergence. A typical symptom of Barley yellow dwarf is the purplish-yellow color of infected leaves, especially the flag leaf.

Color-coded map showing the spring 2022 first-leaf return interval. For assistance reading this graphic and data set, please call SDSU Extension at 605-688-4792.

Late Spring Bloom in 2022

In South Dakota, with temperatures cooler than average in 2022, the arrival of spring has been later than usual. Indicators like the first leaf or bloom of some common plants can be used to define the arrival of spring.

Century Star watermelon on display.

Melons: How to Grow It

Melons can take quite a bit of garden space throughout the summer, but they reward gardeners with sweet, juicy flavor! Learn how to select, plant and grow them today!

A pile of brown wheat seeds

Fungicide Seed Treatments for Winter Wheat

As producers are preparing to plant winter wheat, one of the decisions to make is whether to use a fungicide seed treatment, and if the answer is yes, which product to use.

Hostas growing under filtered light beneath a tree.

Hosta: A Shade-loving Perennial

Hostas, known for their foliage and love of shade, have developed into a coveted landscaping staple. Learn how to select, plant and grow a hosta that's right for your garden or landscape!