Wheat Weeds

All Wheat Weeds Content

Waterhemp growing at the edge of a soybean field nearing harvest.

Row Crop and Noxious Weed Surveys

Controlling noxious weeds and weeds in row crops is a challenge every year. SDSU Extension has created two online surveys to capture the current climate of weed control in South Dakota.

Leafy spurge growing along the edge of a field.

Leafy Spurge Control in the Fall

Leafy spurge is a difficult-to-control, noxious weed in South Dakota. Spring and fall herbicide applications are critical for leafy spurge management.

Canada thistle growing along field’s edge.

Canada Thistle Control in the Fall

Canada thistle begins to transport assimilates and nutrients down its roots in the fall to survive the winter months. Now is the time to consider a fall herbicide application to keep it under control.

Absinth Wormwood Control in the Fall

Absinth wormwood is a difficult-to-control, noxious weed in South Dakota. Now is the time to consider fall applications for absinth wormwood control.

Yellow toadflax in the reproductive-flowering stage.

Yellow Toadflax Control

Yellow toadflax is a short-lived perennial plant that infests pasture and rangeland. If not controlled, it can displace native plant species and increase the potential for soil erosion. Learn some tactics for managing it.

Long, sharp bracts on a flowering female Palmer amaranth plant.

Palmer Amaranth Infestations Have Been Reported in South Dakota

Recent reports of Palmer amaranth infestations are concerning due to its aggressive growth, seed production, and resistance to multiple herbicide groups. Learn some management tactics to help control it before it becomes a serious problem.

Common ragweed and kochia growing along a road ditch.

Late-Season Weed Management

At this time during the growing season, many herbicides cannot be applied to crops in the reproductive growth stage. However, weed management can still be implemented. Learn some expert tips for controlling late-season weeds.

Yellow wheat field with green weeds throughout.

At-Harvest and Post-Harvest Weed Management Tactics in Wheat

Many pre and postemergence herbicides did not adequately control weeds during the 2023 growing season due to early dry and hot conditions. Despite the poor control, there are still options to implement at-harvest and post-harvest to help manage weeds.

Herbicide Resistance Detection in the Field

Have you noticed weeds surviving a typically lethal herbicide application? There’s a chance they’ve developed herbicide resistance. Learn some expert tips for detecting and confirming resistance in fields.

Three green plants that showcase A) waterhemp, B) redroot pigweed, and C) common lambsquarter.

Weeds Have Started to Flower!

Early-flowering waterhemp, redroot pigweed, and common lambsquarters show the importance of early weed control, as they can produce seeds before a delayed postemergence herbicide application.