Content by Graig Reicks

Absinth wormwood, biennial thistle rosette, and leafy spurge.

Recent Rainfall Likely to Improve Fall Herbicide Applications for Noxious Weed Management

Under hot and dry conditions, weeds are stressed and herbicide activity decreases, leading to poor management. While recent rain events have impeded row crop harvest, the moisture is welcomed to improve the activity of fall herbicide performance for noxious weeds in pastures and rangelands.

Group of people watching a presentation during at pesticide applicator training
Oct 20 - 21

Pine Ridge & Rosebud Pesticide Applicator Training

SDSU Extension will host a pesticide applicator training provided to the Pine Ridge and Rosebud communities, held at Crossroads Inn & Annex (102 1st Ave, Martin, SD 57551) on October 20 and 21, 2026.

A small spotted spurge weed in a lawn and a fully-grown mat of spotted spurge on a driveway.

A Surge in Spurge

Spotted spurge is a common, drought-tolerant weed known for its prostrate growth pattern, meaning it grows lying flat on the ground. This is one of the most-difficult weeds to control in lawns, gardens, and landscaping.

Velvet leaf foliage and seed pods.

What is Velvetleaf?

Velvetleaf is a large weed with soft leaves that’s normally associated with corn and soybean fields. However, we’re hearing more gardeners and specialty crop growers reporting its presence.

a wilted pepper plant in a garden plot.

Handling Herbicide Injury in Specialty Crops

Learn how to handle specialty crops that have inadvertently been affected by herbicides.

A group of green plants with white seed heads amongst green grass.

Avoid Noxious Weeds When Haying Right-Of-Way Ditches

After June 15 or July 10 (dependent on location), right-of-way ditches can be mowed or hayed as announced by the South Dakota Department of Transportation. While there is a demand for grass hay, care should be taken when haying right-of-way ditches.

Multiple weed species growing in a grassy area.

Noxious Weeds Should Be Closely Monitored for Management

Pasture, rangelands and rights-of-way are starting to turn yellow, purple, or even a mix of both due to rapid growth of noxious weeds. Now is the time to implement management tactics to ensure the weeds do not outcompete desirable vegetation and invade adjacent land.

Wind carrying a cloud of topsoil over a dry, bare field.

2026 Growing Season: Forecasted dry weather and the implications on postemergence herbicide activity

Weather cannot be controlled, but there are variables we can control to help increase the effectiveness of postemergence herbicides during drought conditions.

Young absinth wormwood, Canada thistle, and leafy spurge plants emerging.

Start Management Plans Now: Absinth wormwood, Canada thistle and leafy spurge have emerged and are starting to grow

Absinth wormwood, Canada thistle and leafy spurge have emerged and are growing in eastern South Dakota. If not effectively managed, these weeds can displace desirable forage in pasture and rangeland.

Herbicide sprayer on the edge of an emerging soybean field.

Syngenta to Stop Production of Gramoxone®

Global pesticide developer Syngenta announced on March 3, 2026 that they will cease global production of the herbicide product Gramoxone® (paraquat), a pivotal source of weed control in corn and soybean production, by June 30, 2026.