Agronomy eUpdate May 21st, 2026

Issue 1104

Early Summer Control of Sericea Lespedeza

Sericea lespedeza continues to spread across Kansas rangeland and pastures, reducing forage production and plant diversity. Learn about identification, integrated management strategies, and the most effective herbicide timing for control.

weed control rangeland pastures sericea lespedeza noxious weed 

Thrips and Other Early-Season Insect Management Considerations in Cotton

Early-season cotton scouting is critical for detecting thrips before economic damage occurs. Thrips pressure in Kansas cotton often peaks from late May through June. Review identification tips, scouting recommendations, and management strategies for protecting young cotton stands.

insects cotton thrips 

Kansas Updates Noxious Weed List for 2026

The Kansas Department of Agriculture has announced updates to the state’s noxious weed list, including several newly added invasive species. Learn about the changes and review management options for species such as knapweeds, teasel, and Amur honeysuckle.

weed control invasive species noxious weed 

World of Weeds: Horsenettle

This latest World of Weeds feature takes a closer look at horsenettle, a spiny perennial weed that can overtake pastures and hay fields if left unmanaged. Learn about identification, ecology, and herbicide control options.

World of Weeds weed control horsenettle 

2026 Kansas Wheat Plot Tours: May 22-June 3

As the wheat plot tour season winds down, several remaining tour dates are scheduled across Kansas. Learn about new and upcoming wheat varieties, agronomic performance, and disease observations at a location near you.

wheat plot tours wheat 

K-State Weed Management Spring Field Day: June 18 in Hays

K-State’s Agricultural Research Center in Hays will host a Weed Management Spring Field Day on June 18 focused on practical weed control strategies for western Kansas production systems. Topics include AI-assisted weed recognition, drone technology, autonomous weed control, herbicide programs, and pasture weed management.

Field Day weed management