2026 Extension Agronomy eUpdate Archive

Explore archived 2026 issues of the Extension Agronomy eUpdate, featuring the latest agronomic research, crop management recommendations, and timely updates for Kansas producers and agricultural professionals.

Issue 1123: October 1, 2026

• Management Considerations Before Baling Corn Residue
• Management Adjustments When Planting Wheat Late
• Rate of Dry Down in Grain Sorghum Before Harvest
• Fall Soil Sampling: Sample Collection and Submission to K-State Soil Testing Lab
• The Challenge of Collecting a Representative Soil Sample
• Herbicide Control of Biennial Weeds in the Fall
• Understanding Nutrient Testing in Agriculture: Extraction vs. Digestion
• Kansas Soil Moisture Update – September 30, 2026
• Warm Temperatures: A Record-Setting September in Kansas

Issue 1122: September 24, 2026

• Planting Cereal Rye After Corn Harvest
• Harvest Aid Application Decisions in Cotton
• Controlling Annual Weeds with Fall-Applied Herbicides
• Get Control of Fall-Emerged Marestail Before Next Spring
• Insect Update: Fall Armyworms Continue to Increase and Army Cutworms Arriving
• Kansas Cool-Season Forage Performance Tests for 2026
• Kansas Soil Moisture Update – September 23, 2026

Issue 1121: September 17, 2026

• Management Considerations for No-Till Wheat Following a Summer Row Crop
• Considerations When Planting Wheat into Dry Soil
• Check Herbicide Label Before Using Soybeans for Livestock Feed
• Options for Late Season Sericea Control
• Kansas Soil Moisture Update – September 16, 2026
• World of Weeds – Goosegrass
• Insect Update: Potato Leafhoppers in Soybeans and Alfalfa

Issue 1120: September 10, 2026

• Wheat Planting: Tips For Good Stand Establishment
• Soybean Seed Filling and Dry Down Rate Before Harvest
• Winter Canola: Setting the Stage for Successful Establishment
• Winter Canola: Planting and Early-Season Management
• Estimating Cotton Lint Yield from Boll Counts
• Small Grain Forage Options For This Fall
• Scout for Fall Armyworms this Fall
• Cover Crop Response to Herbicides
• Conduct Soil Bioassays to Determine Herbicide Carryover Potential
• Summer 2026 in Kansas – The Meteorological Season in Review

Issue 1119: September 3, 2026

• In-furrow Nitrogen and Phosphorus Fertilizer for Wheat
• Kansas Wheat Variety Guide 2026 is Now Available
• Corn Grain Quality: Moldy Ears, Low Test Weight, and Other Issues
• Aspergillus Ear Mold in Corn
• Alfalfa Management: Deciding When to Make the Final Cuts
• Grain Sorghum Yield Components and Estimating Yield Potential
• Managing Phragmites in Waterways, Wetlands, and Roadsides
• Late but not too late: Tar Spot Disease Management for 2027 Starts Now

Issue 1118: August 27, 2026

• Wheat Planting: Be Cautious of Planting Too Early
• Germination Testing for Wheat Seed
• Sudden Death Syndrome in Soybeans: Symptoms, Diagnosis, and Management
• Sample Handling Practices Affect the Accuracy of Plant Tissue Nitrate Tests
• Late Summer Insects to Watch for Grain Sorghum

Issue 1117: August 20, 2026

• Planting Cool-Season Perennials: Smooth Bromegrass
• Soybean Yield Potential Estimation
• Weed Management Practices: Fall Scouting and Equipment Cleaning
• Cereal Rye Control in Wheat
• Pesticide Safety Label Acronyms: What do they mean?
• UPDATED: Sorghum Connection Field Days Adjusted for Aug. 26-27; Dighton Field Day Still on Aug. 28

Issue 1116: August 13, 2026

• Planning Your Wheat Fertility Program: Start Now with Soil Testing
• Soil Fertility and Wheat Production: Profile Nitrate Levels and Wheat Yield
• Soil Fertility and Wheat Production: Liming Soils for Optimum Performance
• Be Aware of Nitrate Toxicity in Drought-Stressed Forages
• Final Irrigation of the Growing Season - Timing is Everything
• Tips for Fall Planting of Alfalfa
• Soybean Pests: Bean Leaf Beetles and Podworms

Issue 1115: August 6, 2026

• Allow Time for Lime Applications When Planting Alfalfa This Fall
• Late-Season Insect Pest Considerations and Bt Stewardship in Cotton
• Webworms are Active in Pigweed and Alfalfa in Western Kansas
• Tar Spot in Kansas Update – August 3, 2026
• Corn Leafhopper Confirmed in Eastern Kansas - No Corn Stunt Spiroplasma Detected to Date
• Update on Southern Rust in Kansas – Active but at Low Levels
• 2026 Western Kansas Research-Extension Center Fall Field Days: Aug. 25-27
• Wheat Rx Programs Planned for Hays and Wichita – August 12 & 13
• North Central Kansas Experiment Field Fall Field Day - August 18

Issue 1114: July 30, 2026

• Wheat Streak Mosaic Complex: The Role of Variety Resistance
• Using Drones for In-Season Corn Crop Scouting
• 2026 National and Kansas Corn Yield Contests – Registration Closes August 12
• Corn Leafhopper Confirmed in Kansas, but No Corn Stunt Spiroplasma Detected to Date
• Southern Rust Continues to be Detected at Low Levels Across Kansas
• Kansas River Valley Experiment Field Fall Field Day, August 11
• East Central Experiment Field Fall Field Day, August 19
• Targeted Herbicide Application Solutions Clinic Scheduled for August 20
• UPDATED: 2026 Sorghum Connection Field Days: August 26-28

Issue 1113: July 23, 2026

• Wheat Streak Mosaic Management: The Role of Other Hosts in the Landscape
• Estimating Corn Yield Potential Using the Yield Component Method
• Summer Weed Control Options in Smooth Bromegrass Hayfields and Pastures
• Southern Rust is Now Active in Kansas
• Corn Leafhoppers are Active in Central Kansas
• Tar Spot Update – July 21, 2026

Issue 1112: July 16, 2026

• Wheat Streak Mosaic Management: Pay Attention to Wheat-Free Windows
• Control Options for Warm-Season Perennial Grasses
• Strategic And Occasional Tillage as a Management Tactic in Long-Term No-Tillage Systems
• Corn Leafhopper Has Been Confirmed in Several Counties in Kansas
• Update on Tar Spot in Kansas – July 16, 2026

Issue 1111: July 9, 2026

• Herbicide Applications and High Temperatures
• Western Bean Cutworm Moths Flying in Western Kansas
• Mid-Season Cotton Pests: Cotton Fleahopper and Lygus Bug Management Considerations
• Cotton Jassid: Emerging Pest Considerations for U.S. Cotton Production
• War Against Weeds Podcast is Looking for Your Feedback
• Help Shape the Future of Cotton Fertility Research in Kansas
• Livestock Mortality Management Workshop Planned for July 29
• Regional Canola Meeting Scheduled for August 4 in Enid, Oklahoma

Issue 1110: July 2, 2026

• Plant Analysis for Testing Nutrient Levels in Corn
• Identifying Nutrient Deficiency Symptoms in Soybeans
• Tar Spot in Kansas – Levels Remain Low
• Cover Crops for Weed Suppression After Wheat Harvest
• Weed Control Challenges with Delayed Grain Sorghum Planting
• Late-Season Herbicide Applications in Corn
• Considerations for Non-Glyphosate Tolerant Cotton

Issue 1109: June 25, 2026

• Consider The Value of Soil Residue Before Baling or Burning Wheat Stubble
• Cover Crops Grown Post-Wheat for Forage
• Herbicide Application Cutoffs for Flowering Soybeans
• Drone Imagery and Artificial Intelligence for Weed Mapping and Postemergence Herbicide Applications
• Beyond Yield Maps: Integrating Yield, Soil, and Topography for Full Field Insight
• Fall Armyworms are Now Active in Kansas
• Watch for Japanese Beetle Activity in Corn and Soybean Fields
• Registration is Open for the 2026 K-State/KARA Summer Field School
• Join the Conversation on Bio-Stimulants – Take this Short Survey

Issue 1108: June 18, 2026

• Saving Fertilizer Dollars: Nitrate Testing Irrigation Water
• Late-Planted Corn in North Central and Eastern Kansas: Hybrid Selection and Crop Insurance Considerations
• Low Levels of Tar Spot Confirmed in Kansas for the 2026 Corn Season
• Fungicide Considerations and Field Scouting for Corn Diseases in Kansas
• Identifying Chinch Bugs and False Chinch Bugs
• World of Weeds: Pokeweed

Issue 1107: June 11, 2026

• Pre-Harvest Weed Control in Wheat
• Considerations for Storm-Damaged Wheat
• Assessing Storm Damage in Corn: Defoliation, Root Lodging, and Green Snap
• Corn Leafhopper Update for Kansas in 2026
• Postemergence Control of Palmer Amaranth in Grain Sorghum
• Management Options for Control of Field Bindweed
• Spray Drones: Benefits and Management Considerations
• Kansas Mesonet Animal Comfort Tool Monitors Current and Forecasted Livestock Conditions
• New General Commercial Applicator Manual Available

Issue 1106: June 4, 2026

• Update on the Extension Agronomy eUpdate Website
• Controlling Weeds After Wheat Harvest
• Considerations for Replanting or Late Planting of Soybeans
• Weekly Fall Armyworm Counts Available Online for the 2026 Season
• Peak Western Corn Rootworm Egg Hatch Underway in Kansas
• Garden Symphylan: A new pest in no-till crops in Kansas?
• 2026 Tribune Wheat Field Day – June 9

Issue 1105: May 28, 2026

• Changes to the Extension Agronomy eUpdate website
• Double Crop Options After Wheat
• Using Remote Sensing to Monitor Wheat Under Weather Variability in Kansas
• 2026 Kansas Wheat Plot Tours: May 29 -June 9
• 2026 Tribune Wheat Field Day – June 9

Issue 1104: May 21, 2026

• Early Summer Control of Sericea Lespedeza
• Thrips and Other Early-Season Insect Management Considerations in Cotton
• Kansas Updates Noxious Weed List for 2026
• World of Weeds: Horsenettle
• K-State Weed Management Spring Field Day: June 18 in Hays

Issue 1103: May 14, 2026

• Quickly Maturing Cool-Season Forages
• Considerations When Harvesting Short Wheat
• Controlling Volunteers in a Soybean/Cotton Crop Rotation
• Chinch Bugs: Time to Start Monitoring Wheat and Adjacent Corn or Sorghum
• Soybean Gall Midge: What to Watch for in 2026
• Kansas Soil Health Network Field Day Scheduled for June 4

Issue 1102: May 7, 2026

• Barley Yellow Dwarf and Wheat Streak Mosaic Complex are Active in Kansas Wheat Fields
• Get Ahead of Weeds: Preplant Herbicide Options for Grain Sorghum
• Drone-Based Early Crop Stand Monitoring and Field Scouting for Improved Decision-Making
• Sorghum Planting Considerations: Planting Date and Hybrid Maturity
• Sorghum Planting Considerations: Seeding Rate and Row Spacing
• Nitrogen Fertilizer Considerations for Grain Sorghum
• Control Options for Buckbrush, Roughleaf Dogwood, and Smooth Sumac

Issue 1101: April 30, 2026

• Soybean Response to Standing Water and Saturated Soils
• Effect of Standing Water and Saturated Soils on Corn
• Wheat Disease Update: Leaf Rust and Stripe Rust are Active in Kansas
• Sidewall Compaction from Planting into Wet Soils
• Plan Now for Volunteer Corn Control
• Herbicide Safeners in Crop Protection
• Some Paraquat Products to be Discontinued after 2026
• Kansas Climate Report and Drought Update: April 22-28, 2026