Agronomy eUpdate July 24th, 2025

Issue 1063

Wheat streak mosaic management: The role of variety resistance

The third article in our wheat streak mosaic complex series focuses on variety selection as a key part of integrated disease management. This week, we highlight resistant varieties, discuss genetic resistance to both virus and mite, and provide tips tailored to Kansas growing regions.

disease wheat streak mosaic wheat curl mite 

Pre-emergence herbicides in wheat

While not as common as in other crops, residual herbicides can be valuable in wheat production. This article outlines key product options, herbicide group classification, and considerations for application timing and resistance management.

wheat weed control pre-plant herbicide pre-emergence residual herbicides 

EPA announces proposed decision to approve registration for over-the-top dicamba formulations

The EPA has released a memorandum outlining proposed label requirements for dicamba applications over dicamba-tolerant soybean and cotton. Public comments are being accepted within a 30-day window.

dicamba label requirements herbicides EPA 

Southern corn rust now confirmed in southwest Kansas

Southern rust has now been detected in multiple Kansas counties, including a recent report in the southwest. With favorable weather conditions in place, growers should begin scouting fields and evaluating the need for fungicide applications.

corn disease southern rust 

Wheat Rx Preplant Seminar - August 20 in Pratt

Make plans to attend the 2025 Wheat Rx Preplant Seminar on August 20 at the Pratt County 4-H Events Center. Experts from K-State and Kansas Wheat will present on variety selection, wheat streak mosaic, conservation practices, and more.

wheat Wheat Rx seminar 

Sorghum Connection field day series returns in 2025

See sorghum research in action at this year's Sorghum Connection field days. Topics include fungicide and seed treatment trials, hybrid performance, and precision ag applications using drones. These free events will be held Aug. 27-29 in Bavaria, Russell, and Dighton.

sorghum grain sorghum Field Day Sorghum Connection 

Upcoming webinars to address the Wheat Streak Mosaic outbreak - July 29

Following the widespread 2025 outbreak, K-State is offering two live webinar sessions on wheat streak mosaic management. Learn about the viruses, wheat curl mite, resistance strategies, and how to prepare for fall planting. Choose from two live sessions on July 29.

wheat streak mosaic virtual webinars 

Upcoming Western Kansas Fall Field Days

K-State Research and Extension specialists will host a series of fall field days across western Kansas from late July through early November. These events will feature the latest research updates on crop production, irrigation, soil fertility, forage systems, and more.

Western KS Fall Field Days 

Kansas River Valley Experiment Field Fall Field Day, August 12

Don't miss the 2025 Kansas River Valley Experiment Field Day on August 12 at 5 p.m., located one mile east of Rossville on Hwy 24. This free event offers insights on precision ag management zones, crop disease updates, and fertility strategies.

Fall Field Day River Valley 

East Central Experiment Field Fall Field Day, August 20

All are invited to the 2025 East Central Experiment Field Fall Field Day on Wednesday, August 20, starting at 9 a.m. at the Ottawa Experiment Field near Ottawa, KS. Hear from K-State experts on management zones, crop disease research, and fertility strategies.

Fall Field Day East Central