Crop Treatments

All Crop Treatments Content

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.

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.

Two pictures of green sunflower plants amongst brown dirt and tan crop residue. Taller, green corn plants can be seen in the distance.

Would you rather know or assume? A reminder to check varieties before spraying.

No matter how busy you are this growing season or in the future, you should never be too busy to stop and take a few minutes to double check herbicide types and crop varieties before spraying.

Small, green weeds throughout with a brown yard stick showing the weeds’ height being 2.5 inches.

Postemergence Herbicide Applications Need to Happen Soon in Soybean

In soybean crops, postemergence herbicides should be applied to smaller weeds, but proper scouting is likely necessary before application. Learn everything you need to know before making an application this growing season.

A red, tractor-mounted sprayer with its tank being flushed by a hose connected to a large truck.

Dicamba Cannot be Applied Postemergence in Dicamba-Tolerant Soybeans After June 20

With weather delaying the planting of soybean, the clock is ticking to spray dicamba before the cutoff date of June 20, 2024. Learn what application tactics might work best before the deadline.

Tractor applying postemergence herbicide to a corn field early in the growing season.

Considerations of Corn Postemergence Herbicides

Managing weeds after emergence is important to protect the yield potential of corn crops. Learn some important application considerations before selecting a postemergence herbicide.

Producer with tablet observing a field in late autumn.

Critical Period of Weed Control: A good, but not perfect guideline

The critical period of weed control is the period during a crop lifecycle when weeds need to be managed to avoid a significant yield loss.

Canada thistle growing in a pasture.

Current State of Noxious Weed Management in South Dakota

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

A collection of empty pesticide and herbicide containers.

Herbicide Group Classification

The intent of providing herbicide group numbers and mode/site-of-action information on labels is to help develop herbicide plans that reduce the selection pressure on herbicide-resistant weeds. Learn how understanding this information can help improve your plans.