Agronomy eUpdate July 27th, 2023

Issue 967

Corn development in Kansas during recent high temperatures

Kansas is in the midst of an impressive heat wave. The impact of this heat is causing concern, particularly related to corn development. This article compares this growing season to conditions in 2022, looking at the number of Stress Degree Days. What does this period of heat stress mean for the yield potential?

corn hot weather drought stress heat stress crop development 

Dual-purpose wheat variety performance 2023

An updated publication is now available in the Wheat Rx series that examines the performance of several wheat varieties grown for use in a dual-purpose system. This publication evaluates fall forage yield, date of first hollow stem, plant height, grain yield, and test weight of varieties in a dual-purpose system versus a grain-only system.

dual purpose Performance Tests grazing wheat first hollow stem 

Coleoptile length of winter wheat varieties 2023

Wheat varieties with long coleoptiles are more likely to emerge when planted deep enough to reach soil moisture from past rainfall. An updated publication is now available in the Wheat Rx series that examines the coleoptiles lengths of many Kansas wheat varieties.

wheat publication variety trials wheat variety coleoptile 

Kansas Wheat Variety Guide 2023 is now available

Variety selection is one of the most important decisions that a grower can make to ensure success. The Kansas Wheat Variety Guide 2023 (formerly called Wheat Variety Disease and Insect Ratings), from K-State Research and Extension, has now been released for this year. Agronomic characteristics, disease, and pest resistance information are included, as well as profiles for some common or new varieties for Kansas.

publication wheat variety selection wheat variety 

Western bean cutworm activity in Kansas

Western bean cutworms are primarily a pest of corn in Kansas and activity is generally isolated to the western part of the state. Early detection of egg masses is important, as any chemical control needs to happen before larvae enter corn ears. When the field is almost fully tasseled, an average of 8% of plants with eggs or small caterpillars justify control measures.

insects corn western bean cutworm 

Have problems with Sudden Death Syndrome in soybeans?

Can you help? We are in search of grower fields with symptomatic Sudden Death Syndrome (SDS) plants for us to sample. Root symptoms include necrosis and above-ground symptoms include interveinal leaf chlorosis and necrosis. Under the right environmental conditions, these symptoms appear as early as the start of flowering.

soybeans Sudden Death Syndrome SDS 

North Central Kansas Experiment Field Day, August 17

All interested individuals are encouraged to attend the North Central Kansas Experiment Field Fall Field Day near Courtland on August 17 at 5:30 p.m. A free meal will be provided at the end of the event. Details about the topics to be presented are included in this article.

Fall Field Day North Central