Crop Treatments

All Crop Treatments Content

Corn plants and scattered weeds emerge from a dry, no-till field.

Dry Conditions May Hinder the Performance of Recently Applied Preemergence Herbicides

If a preemergence herbicide does not receive an activating rainfall, generally 0.5 to 1 inch of rain, many weeds will emerge, as the herbicide remains on the soil surface.

Farmer inspecting a no-till field before planting.

Early Preplant or Preemergence Applications for Weed Management in Corn: Which is better?

Preemergence herbicides should be a part of a successful weed management plan, as these applications limit the amount of early-season weed interference to limit yield loss and reduce selection pressure on herbicide-resistant weeds.

Atrazine carryover injury to eastern redcedar seedling

Herbicide Carryover and Planting Bare-Root Tree Seedling in New Windbreaks

Guidelines on herbicide carryover when planting bare-root tree seedlings in new windbreaks

A red sprayer in a green field with a cloudy sky in the background.

How to Stop Drift

The goals of applying any crop protection products include: increasing effectiveness, mitigating drift, and maximizing profits. We will focus on mitigating drift, even though all three interact with each other.

Two scans of older SDSU Extension publications from 1949 and 1959.

Revisiting Old Lessons in Corn Weed Management: 2,4-D and dicamba

What can past herbicide programs teach us about managing against herbicide-resistant weeds in corn today?

Group of farmers strategizing near a field at sunset.

Now is Time to Plan Your Weed Management Strategy for the 2025 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 next growing season.

Now is the Time to Plan for Noxious Weed Control in 2025

Since most of South Dakota has experienced several frosts, the opportunities for fall herbicide applications are likely over. Now is the time to plan for noxious weed management for both spring and fall tactics.

Producer with tablet observing a field in late autumn.

Now Is the Time To Make Your Weed Management Plan for the 2024 Growing Season

Soybean field with abundant grass and weeds between rows.

Cheap and Simple Soybean Herbicide Programs Do Not Pencil Out

While simple, one-herbicide programs are initially easy on the budget, it is important to consider indirect costs of surviving resistant weeds that reduce soybean yield and produce seed that will have to be managed later.

Young farmer examining soybean plants n a field at sunset.

Be Aware of Fungicide Resistance in Field Crops

A few soybean and corn fields have received or will be receiving a fungicide application this season. We recommend scouting fields treated with fungicides to determine if diseases are controlled as expected or if there are signs of reduced sensitivity.