Skip to main content

Search

SDSU Research Shows Effects Of Volunteer Corn In Corn And Soybeans

In 2007, researchers at South Dakota State University indicated that volunteer corn is much less competitive in corn than soybean. The South Dakota study (Alms et al. 2007) evaluated the full season effect of a range of volunteer corn densities (800-14,000 plants/acre) on both corn and soybean and reported yield losses that ranged from 0% to 13% in corn and 0% to 54% in soybean.

A medium-sized shrub with many upright stems next to a white shed

Woody Weeds: Tatarian Honeysuckle

Tatarian honeysuckle (Lonicera tatarica) was brought to North America from Asia in the mid-18th century for ornamental uses. In South Dakota it was also used as a windbreak species until the 1980s.

Looking down onto a Palmer amaranth plant one sees how the whorled leaves are designed to receive sunlight.

Check Fields for Palmer Amaranth

Palmer amaranth, is an aggressive weed from the pigweed family, which has been reported with increasing frequency in recent years around Central South Dakota.

A collection of empty pesticide and herbicide containers.

Changes in Pesticide Applicator Certification During COVID-19

April 27, 2020

Due to office closures as a result of COVID-19, commercial pesticide applicator testing is currently unavailable at the SDSU Extension Regional Centers and county offices.

A patch of soil with kochia weeds growing throughout.

Temperature and Herbicide Performance

In South Dakota, the spring can come with a wide range of temperature fluctuations. This will affect the performance of burndown herbicides. Depending upon the target weed, type of herbicide and application rate, there will likely be decreased weed control in cooler temperatures.

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.

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

Checking Weed Control at Harvest

With harvest now in full swing, don’t forget to look at your fall weed control. What are the weeds that are left in your crop? Do you know what weeds they are? Is there a weed that you do not know?

What's That Vine?

One of the most frequently asked questions that I have gotten recently refers to a vining plant that looks like it is going to take over the world, or at least a few trees in the yard or a section of a shelterbelt.

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

South Dakota Department of Agriculture Suspends All Sales and Application of Dicamba Product

June 08, 2020

On June 3, the United States Court of Appeals for the Ninth Circuit issued a decision to vacate the registration of three Dicamba products including Xtendimax, Engenia, and FeXapan for over the top use on soybeans.