LAMAR, Mo. — Jill Scheidt, agronomy specialist with University of Missouri Extension, scouted fields east of Mindenmines for the May 10 crop scouting update.
Wheat was in the milk to soft dough stage.
Scheidt observed glume blotch was on the kernels and loose smut in a few fields.
“Glume Blotch is common every year; both glume blotch and loose smut are seed-borne diseases,” said Scheidt.
Central Missouri University professor Oscar Perez-Hernandez visited Barton County last week to scout for head scab.
“Fusarium head scab was not identified last week, as it was too early; look for bleached or shriveled kernels,” said Scheidt.
Scheidt recommends scouting for armyworm in wheat and fescue weekly, in the morning before it gets hot. Threshold level for armyworm in fescue and wheat is 4 per square foot.
“Rodent feeding was seen at field edges that were close to grass, damage looks similar to armyworm, but rodents usually lay wheat stems in piles and burrows are nearby,” said Scheidt.
Corn was in the 3-6 leaf stages.
“New leaves were beginning to emerge and roots of plants were healthy and white. Most fields are at a slight risk for additional nitrogen applications; visit the MU Extension Nitrogen Watch website to see a risk assessment,” said Scheidt.
According to Kevin Bradley, state weed specialist with University of Missouri Extension, if replanting, small corn can be terminated with Select Max with a 6 day replant restriction. Paraquat mixed with Atrazine can be applied with no replant restriction.
Liberty alone does not offer very good control because most corn has a tolerance. https://ipm.missouri.edu/IPCM/2017/5/Herbicide_Options_for_Killing_Failed_Corn_Stands/
After May 11, corn yield potential drops to 79% and 75% after May 16.
Greg Luce, state grain crops specialist with University of Missouri Extension, does not recommend switching to a shorter season variety until after June; full season corn usually has the ability to adapt and are safe to plant until June.
MORE INFORMATION
The weekly field scouting report is sponsored by University of Missouri and Barton County Extension. For more information on the scouting report, or to learn how to receive the information earlier by telephone, contact the Barton County Extension Center at (417) 682-3579.
— Jill Scheidt, University of Missouri Extension
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