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Aspergillus Ear Rot




  • © Purdue University, Plant and Pest Diagnostic LaboratoryPathogen(s) causing disease: Aspergillus flavus, A. glaucus, A. niger  

    Symptoms: Aspergillus niger appears as a black mold on infected kernels. A. flavus is a greenish-yellow mold growing on damaged kernels. A. glaucus is a greenish mold. Most common at tip of ear and scattered on a few kernels on ear. 

    Conditions: A. flavus is more common following hot, dry weather, injury by drought stress and insect damage. A. flavuscan produce a carcinogenic secondary metabolite known as aflatoxin.  It can grow at temperatures higher than 90° F, and grain moisture content as low as 14-15 percent.   

    Management: In storage, controlled by drying corn to a moisture content below 15 per cent as soon after harvest as possible. In the field, avoid insect or mechanical damage to ears. 

    Sources
    Purdue University
    University of Illinois

    Original Article Here

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