Wheat Weeds

All Wheat Weeds Content

Yellow wheat field with green weeds throughout.

Weed Control Field Test Data

Data books to use as a reference to select appropriate herbicide(s) for row crops

Close-up of a plant with broad, lobed green leaves with serrated edges. The stems and veins of the leaves are a reddish-purple color and possess dark spots.

Identification and management of common cocklebur

Fact sheet to help identify and manage common cocklebur.

Patch of green giant ragweed plants growing among corn plants.

Identification and management of common ragweed and giant ragweed

Fact sheet to help identify and manage common ragweed and giant ragweed.

sun rising over South Dakota field

South Dakota Pest Management Guides

The South Dakota Pest Management guides are now available for free. The guides offer recommendations for controlling weeds, insects, and diseases in a variety of South Dakota crops.

Tractor with sprayer applying postemergence herbicide to soybeans.

Current State of Row Crop Weed Management in South Dakota

Results of an online survey to determine how South Dakota stakeholders are currently managing row crop weeds.

Small, green and yellow florets being held by a hand.

Isolated Female Waterhemp Plant Produced Seed: Implications that pollen is in the air

Recent observations by the SDSU Extension Weed Science team highlight that pollen can move far distances to pollinate isolated female plants. This reinforces the need to effectively manage weeds in fields and adjacent areas.

Tractor applying residual herbicide to a bare field.

Fall-Applied Residual Herbicides

Many parts of South Dakota can experience dry conditions when residual herbicides are applied, resulting in inadequate weed control. In these areas, residual herbicides can be applied in the fall and take advantage of a longer period to receive activating precipitation.

A white and purple seedhead of a Canada thistle with a blurry, bright green background.

Perennial Weed Management in the Fall

Most herbicide applications to manage perennial weeds have already occurred. However, now is the time to consider fall applications for weeds that were not treated or escaped the spring application.

A green Canada thistle with large, round galls throughout.

Galls on Canada Thistle: Biological Management at Work

A common sight this summer on Canada thistle is odd growths (also known as galls) on stems. These galls are a product of thistle stem gall fly attacking Canada thistle plants.

United States Environmental Protection Agency Sign plate outside the agency’s main office.

EPA Issues Emergency Order: Stop Using Dacthal

Following a review of data associated with the use of dimethyl tetrachloroterephthalate (sold under the most-common trade name, Dacthal), the EPA has issued an emergency order to stop using this active ingredient effective immediately.