Agronomy eUpdate July 6th, 2023

Issue 964

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

Tar spot of corn, a disease caused by the fungus Phyllachora maydis, has now been confirmed in four counties in Kansas. Producers in northeast Kansas should be actively scouting their corn fields. To learn what to look for and what fungicide options are available, check out this article from Row Crop Disease Specialist, Rodrigo Onofre.

corn disease fungicide tar spot 

Palmer amaranth control in grain sorghum

When the aggressive nature of Palmer amaranth is combined with the limited post-emergence herbicide options in grain sorghum, problems often arise even when an adequate pre-emergence herbicide program is used. This article covers post-emergence herbicide options for Palmer amaranth control in grain sorghum.

sorghum grain sorghum weed control palmer amaranth 

Dicamba injury on soybeans - now what?

Even though the cutoff date for applying dicamba over the top of soybeans passed last week, there is still some conversation about dicamba applications and off-target movement to sensitive soybeans. This article summarizes some of the recent research on this topic at K-State.

dicamba soybeans herbicide drift herbicide injury 

Soil Management: On-site wastewater treatment systems

For new home builders in rural areas in particular, selecting the location of the onsite wastewater system is not often the first thing they think about. It is important to give that some consideration early in the planning process. The location, size of the home, and type of system can vary greatly in cost.

wastewater septic systems 

Germination testing for wheat seed: At home and professional seed laboratory

Some producers may be anxious this year to find out the germination percent of the wheat they harvest, to see if it will make suitable seed. Testing the seed too soon after harvest will affect the accuracy of the test. At-home testing is an option but professional testing is recommended for wheat that experienced stress during grain filling.

wheat germination testing wheat seed 

Accelerated Aging test helps identify weak wheat seed

Beyond the standard germination test, most professional seed testing labs offer an Accelerated Aging test that will test the seed for anticipated emergence vigor. This test is very capable of identifying weak seed lots where there are issues with Fusarium head scab; heating in the bin; smaller, development-stressed seeds; or are more than a year old.

wheat germination testing wheat seed 

Kansas River Valley Experiment Field Fall Field Day- August 8

All interested individuals are invited to attend the 2023 Kansas River Valley Experiment Field Day on Tuesday, August 8 at the Rossville Experiment Field. This is a free event with a catered meal to follow the program. Topics include nitrogen fertility strategies, cover crops for weed control, corn and soybean management, and fungicides for row crops.

Fall Field Day  

K-State East Central Experiment Field Fall Field Day, August 16

All interested individuals are invited to attend the 2023 East Central Experiment Field Day on Wednesday, August 16 at the Ottawa Experiment Field. This is a free event with lunch provided and no pre-registration. Come learn about nitrogen fertilizer strategies, cover crops for weed control, corn and soybean management, and fungicides for row crops.

Fall Field Day  


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