Agronomy eUpdate October 13th, 2022

Issue 928

Green stem syndrome in soybeans

Green stem syndrome in soybean is a condition where the stem remains green while the seeds are mature and ready to harvest. In parts of Kansas, there are fields of soybeans with brown pods but green stems. Harvesting soybeans with green stems can be challenging.

green stem soybeans 

Cover crop response to herbicides

Cover crop response to herbicides will be influenced by a number of factors, including biological and biochemical characteristics of the plant, chemical characteristics of the herbicide, and weather conditions since herbicide application. This article summarizes the response of selected fall-plantedvcover crops to herbicides applied the previous spring.

cover crops herbicide termination 

Rate of dry down in sorghum before harvest

In recent years, a common question from producers is related to the dry down rate for sorghum when approaching the end of the season. The dry down process can be delayed by low temperatures, high humidity, and high grain moisture content at black layer. Learn more in this article from KSU farming systems specialist, Ignacio Ciampitti.

drydown sorghum grain sorghum 

Fall soil testing of hayfields and pastures

Soil testing can be done in either spring or fall on hayfields and pastures. Fall soil testing allows more time for any needed lime applications to have an effect before the main growing season begins, and it gives the producer some flexibility for planning nutrient applications. With high fertilizer prices, accurate soil tests are even more important to help save on input costs.

pastures hayfields fall soil sampling 

Tar spot of corn is now confirmed in five counties in Kansas

Tar spot of corn has now been confirmed in five counties in northeast Kansas. Tar spot lesions are black, raised and have a round/elliptical shape. This pathogen can survive in crop residue. Producers are encouraged to scout any standing corn fields. Fields with confirmed causes should be harvested last if possible to mitigate disease spread.

corn disease foliar diseases tar spot 

After harvest is the optimal time for Soybean Cyst Nematode sampling

Soybean cyst nematode (SCN) is a major problem in soybean fields throughout eastern and central Kansas. It is important to monitor SCN levels regularly to determine if management strategies, such as variety resistance and crop rotation, have been successful. Free SCN testing is available through the KSU Plant Disease Diagnostic Lab. Find out more in this article.

soybeans soybean cyst nematode nematodes 

Kansas Mesonet fall freeze and winter cold tool available

The morning of October 8 saw the first fall freeze in the state occurring in northeast Kansas. Now that cooler temperatures are starting to arrive, don't forget about the Kansas Mesonet's Freeze Monitor tool. The Freeze Monitor is a handy tool to check the conditions in your area. This article describes all the features and how to get the most of this free online resource.

winter weather Mesonet freeze monitor 

Summer of 2022: Temperature rankings for 40 locations in Kansas

In this article, we take a final look at the heat of 2022 by the numbers. Specifically, we look at the occurrence of highs of at least 90 and 100F at 40 sites across Kansas, an update to an earlier eUpdate article from early August.

climate weather hot weather summer  

Kansas Ag-Climate Update for September 2022

The Kansas Ag-Climate Update is a joint effort between our climate and extension specialists. For September 2022, warm conditions across the state further developed drought. The statewide average temperature for September was 72 degrees, which is over 3 degrees above normal.

weather Climate