Content by Eric Jones

Waterhemp Has Emerged in South Dakota

Waterhemp seedlings were observed in Volga, South Dakota and other observations of emerging seedlings have been and reported elsewhere in the state. While the seedlings are still small, forecasted rain and increased temperatures will cause these plants to grow rapidly.

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.

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.

Great Temperature Shifts This Spring: Implications for burndown herbicide applications

The 2026 growing season is beginning as temperatures begin to increase. The increased temperatures are favorable for growing conditions, however, great temperature shifts throughout the day may adversely affect the activity of herbicide applied for preplant burndown.

Organic Herbicides for Lawns

Organic herbicides are becoming more common on the market due to the perception that these products as safer towards humans, pets, and the environment. For those interested in these products, there are several factors to consider.

Preemergence Crabgrass Herbicide Decisions

The optimal application window for preemergence herbicides to manage crabgrass in turf is normally during April, and earlier in the month during warmer years.

SDSU Research Update on Herbicide Resistance Screening

SDSU Extension's herbicide resistance screening has been gathering valuable information on regional resistance patterns across South Dakota. Results will help guide herbicide selection, tank-mix strategies, and resistance management programs for growers.

EPA Approves Dicamba for Over-the-Top Applications in Tolerant Soybean in 2026 and 2027

The Environmental Protection Agency has issued a limited-time registration of over-the-top use of dicamba on tolerant cotton and soybean for two growing seasons, 2026 and 2027.