Weeds & Invasive Plants
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2026 Commercial Applicator Training Online Course
SDSU Extension partners with DANR to offer pesticide certification program required for commercial applicators. The 2026 online course will be offered through Traininghouse and will be open from December 3, 2025, through February 28, 2026.
Now is the Time to Plan for Noxious Weed Control in 2026
Most of South Dakota experienced first frosts that were delayed by at least one month, allowing for noxious weed growth to continue later in the season. Now is the time to plan for noxious weed management tactics.
Now is the Time to Prepare Your Weed Management Plan for the 2026 Growing Season
As harvest season comes to an end, now is the time to start formulating your weed management plan for next year. Learn some expert tips for getting your operation off to a good start this coming growing season.
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.
Commercial Aerial Applicator Training @ Tri-State Aerial Applicators Convention
SDSU Extension, NDSU Extension, and UMN Extension will host a joint aerial commercial applicator training on February 19, 2026, from 11:45 a.m. - 2:15 p.m. CST in conjunction with the Tri-State Aerial Applicators Convention, which will be held at The Delta Hotel in the Symphony Hall (1635 42nd St SW, Fargo, ND 58103).
Noxious and Pasture Weed Plot Data Report
Data books to use as a reference to select appropriate herbicide(s) for noxious and pasture weed
Perennial Weed Control in Lawns and Turf With Fall Herbicide Applications
Early fall is great time to control perennial weeds in lawns, including Wild violet, Creeping Bellflower, Ground Ivy, and Canada Thistle. Learn some expert tips selecting the right herbicides to manage these difficult-to-control weeds this fall.
Yellow Toadflax Has Begun Producing Seeds: Scout before treating infested areas
Yellow toadflax is a perennial weed that infests pasture and rangeland across South Dakota. This year, with an abundance of heat and moisture, plants flowered in early August and now have started to produce seeds.
Home Horticulture Resources for Gardeners
Horticulture is the branch of plant agriculture dealing with garden crops. In addition to our website, there are many horticulture resources available on the web to provide research-based information to help every gardener succeed.
Palmer Amaranth Confirmed in Turner County: Is this weed in your fields?
Palmer amaranth has recently been confirmed in Turner County. Currently, the estimation of Palmer amaranth infestations has been confirmed in 18 counties across South Dakota