Friday, July 16, 2010

Rain Helps Overall Crop Production; Southern Rust Remains a Concern

By David Burton
University Extension

Recent rainfall in southwest Missouri continues to help make overall crop production look very good in the region according to Jay Chism, agronomy specialist with University of Missouri Extension.
“Corn continues to show some foliar diseases. As I have mentioned in previous weeks, common rust is the most prevalent foliar disease in area fields,” said Chism.
Questions about the severity of southern rust continue to come in to the Barton County Extension Center.
“I still have only seen limited amounts of southern rust, but do want to caution you that the disease can move quickly under the right conditions,” said Chism. “Although I am not a big proponent of using fungicides on corn every year, this season may be a good one to try fungicides in some fields.”
The ample moisture and good overall stand indicates that the yield potential for this season’s crop is good, even on some dry land corn, according to Chism.
“With these factors in mind, and if disease pressure is high late in the year, fungicides may be a profitable input this season. I would only consider fungicides on fields that have yield potential of 150bu/acre or more. For fields with lower yield potential a fungicide application will more than likely not pay,” said Chism.
Soybeans also continue to look good in southwest Missouri.
“I did receive a call about a large number of brown moths flying in soybean fields. I will have it confirmed by our state entomologist, but I believe they are corn ear worm moths,” said Chism.
Corn ear worm larvae can feed on soybean pods, but for now no damage is present and it does not require control.

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