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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.

Corn plants with noticable rotting near the bottom stem.

Fusarium Root and Crown Rot Developing in Corn

A few corn fields scouted in Brookings County were found with Fusarium root rot at low levels. Infected plants were wilting and upon splitting of the lower nodes revealed brown discoloration of the pith. Root and crown rots developing in corn after the seedling stage are usually caused by Fusarium spp. and can be enhanced by injury to the roots or crown, mainly by insect feeding.

Three wheat plants exhibiting disease symptoms. From left: Tan spot, powdery mildew, and Barley yellow dwarf.

Winter Wheat Diseases Update: Fungal Diseases and Barley Yellow Dwarf Developing

Tan spot and powdery mildew as well as barley yellow dwarf were found developing at low levels in winter wheat fields scouted the week of May 24, 2020.

Winter wheat emerging from a planted field.

Double-Crop after Wheat?

Two crops in one year may sound tempting, and for some crop species is possible, but before doing so, producers should consider possible crops and compare the potential benefits with the drawbacks.

State 4-H Ambassador sitting at a table filling out an application

Become a State 4-H Ambassador

Curious about what it takes to become a South Dakota State 4-H Ambassador? View the position descriptions, term timeline, and application process.

small group of mixed calves

Does Cold Weather Contribute to Pneumonia in Calves?

Prolonged winter cold has some fairly obvious effects on cattle of all ages.

Color-coded map of the United States showing October 2022 temperature outlook. Temperatures in South Dakota are leaning above average. For assistance reading this graphic and data set, please call SDSU Extension at 605-688-4792.

2022 Fall and Early Winter Climate Outlook

The warmth of September is likely to continue into October with odds leaning towards drier than average conditions according to the latest climate outlook released on September 15, 2022.

Gray beetle with long antennae that are alternating white and black pattern on green leaf petiole.

Dectes Stem Borer Adults Active in Sunflower

In South Dakota, one of the insects that is commonly observed in sunflower is the Dectes stem borer larva. At this point in the season, adults are beginning to become active with females laying eggs in sunflower plants.

A green corn leaf with yellow to brown spots throughout.

Corn Disease Update: September 2, 2025

As of September 2, 2025, a number of corn diseases have been reported and confirmed throughout South Dakota. View our latest findings as we approach the fall harvest season.

Swarm of mosquitoes.

West Nile Virus Update: September 10, 2025

As of September 10, 2025, the South Dakota Department of Health (SD DOH) reported 59 human cases of West Nile virus from Beadle, Bon Homme, Brookings, Brown, Charles Mix, Codington, Corson, Grant, Gregory, Hamlin, Hand, Hughes, Hutchison, Hyde, Lawrence, Lincoln, Marshall, Meade, Miner, Minnehaha, Pennington, Sanborn, Spink, and Walworth counties.