Agronomy eUpdate March 31st, 2022

Issue 900

First hollow stem update (31 March 2022)

Cattle should be removed from wheat pastures when the crop reaches first hollow stem (FHS). Grazing past this stage can severely affect wheat yields (for a full explanation, please refer to the eUpdate article “Optimal time to remove cattle from wheat pastures: First hollow stem”). All varieties except for LCS Julep had elongated more than 1.5 cm first hollow stem as of 29 March 2022. We will report first hollow stem early next weeks until all varieties are past this stage.

wheat grazing dual purpose first hollow stem 

Prohibition for Enlist One and Enlist Duo lifted for Kansas

Enlist One and Enlist Duo amended supplemental labels were approved on March 29 to allow use in 10 counties in Kansas (Chautauqua, Cherokee, Cowley, Elk, Greenwood, Labette, Montgomery, Neosho, Wilson, and Woodson)

weed control label requirements enlist 

Weed Management Podcast Wrapping up Third Season

Season three of “War Against Weeds” podcast is on going adding eleven new episodes since January. Season three episodes have included topics that range from kochia biology and management to the influence of the Endangered Species Act enforcement on weed management.  Episodes remaining for season three include an update on herbicide resistant weed research and a discussion about using drones for weed management. Episodes are approximately 30 minutes long and free to access. They are posted at

weed control podcast War on Weeds 

Outlook for stripe rust in the 2022 Kansas wheat crop

The weather is warming, and wheat has started to green up across the state. With the onset of spring weather, it is time to look at factors that could influence the yield potential of the Kansas wheat crop. At the time of this publication, there have been no reports of stripe rust in Kansas.

wheat stripe rust foliar diseases