Content by Cody Molnar
Black Rot of Brassica Crops
Black rot is an uncommon, but devastating bacterial disease in South Dakota that can develop during extended periods of hot and wet weather, leading to rapid and widespread crop loss.
Nostoc in Lawns
Nostoc is a genus of cyanobacteria that form colonies in gelatinous masses. In South Dakota, it commonly appears in home lawns, notably in patches where grass is not growing, especially after periods of rain.
Commercial Ornamental/Turf Applicator Training @ Sioux Falls
SDSU Extension will host ornamental and turf commercial applicator training in Sioux Falls at the Best Western Plus Ramkota (3200 W Maple St, Sioux Falls, SD 57107) on February 12, 2026. CST.
Commercial Ornamental/Turf Applicator Training @ Rapid City
SDSU Extension will host ornamental and turf commercial applicator training in Rapid City at the Ramkota (2111 N LaCrosse St, Rapid City, SD 57701) on February 25, 2026, from 9:30 a.m. – 4:30 p.m. MT.
Private Applicator Training for Specialty Crops
SDSU Extension will host a free private applicator training for specialty crops on March 18, 2026, from 1:30 - 4:30 p.m. CT (12:30 - 3:30 p.m. MT). Participants have the option to attend online or at various locations across the state.
Pumpkin Carving Preservation
Pumpkin carvers can use several techniques to slow or prevent the spread of pathogens and help their jack-o’-lanterns last longer. Learn some expert tips for getting the most out of your pumpkin carvings this fall.
Fasciation: What’s going on with my plant?
Fasciation is a malformation of plant parts commonly manifested as enlargement, flattening or cojoining. The abnormal growth of plants can be uniquely puzzling and beautiful at the same time.
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.
Aster Yellows Phytoplasma
Aster yellows is a phytoplasmal disease carried and introduced by aster leafhopper. It is known to infect over 80 different plant families, as the aster leafhopper has extremely broad feeding habits.
Corn Diseases in South Dakota Update
Several South Dakota counties have confirmed positive cases of Southern Rust and Tar Spot this growing season. See our latest recommendations for dealing with these diseases before they become a problem.