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Agronomy Talk

NE ILLINOIS, NW INDIANA, SE WISCONSIN - CHAD KALAHER, CCA

Disease Pressure Low in Corn and Soybeans

Published on Wednesday, August 31, 2016

Disease levels have been low in both corn and soybeans compared to this time last year. In corn, early observations near  tasseling showed very light amounts of gray leaf spot, northern corn leaf blight, and common rust. Septoria brown spot has been observed in soybeans. 

In some areas, insects have been observed that are likely related to cropping systems, management practices, and/or weather events. These include corn rootworm beetles and European corn borer in corn, and Japanese beetles in both corn and soybeans. The driest areas during June also saw some spider mite activity in soybeans, as well as grasshopper feeding in corn. As you prepare equipment for harvest, be sure to evaluate corn fields for stalk and root quality prior to harvest. Split the stalk below knee height, as well as the root crown, and look for healthy tissue. In late August, also look for signs of Sudden Death Syndrome (SDS) in early-planted soybean fields that did not have ILeVO® seed treatment. Consider this optional seed treatment for early-planted (prior to May 10) soybeans in 2017. 

Make plans now to initiate residue management strategies as soon as possible after a field has been harvested. In addition, review the age of your soil fertility tests and evaluate the needs for updated data. 

Author: Chad Kalaher

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