Corn Diagnostics

Corn Diagnostic Guide

Development Stage	Appearance or symptom	Appearance or symptom
Planting to Emergence	Skips in rows where plants fail to emerge	Seed eaten, dug up or sprouts cut off
Emergence to 8-10 leaves	Scattered dead or poorly growing plants Wilting Discolored Plants Discolored and stunted plants	Discolored, stunted and/or malformed Lesions of leaves Plant tissue missing or removed
8-10 leaves to tasseling	Severe wilting and/or death of plants Plants discolored Plants discolored and malformed	Plants malformed and/or lodged Plant tissue removed Lesions on plants
Tasseling to Maturity	Silking impaired Tassels malformed Plants discolored Stalks malformed and/or broken Premature death of all or some parts of plants	Leaf tissue removed Plants discolored or stunted Lesions on plants Damage to ears Ears or kernels malformed Ear rotten or moldy

Planting to Emergence || Emergence to 8-10 Leaves || 8-10 Leaves to Tasseling || Tasseling to Maturity || Corn Diagnostic Guide

Adapted by James H. Hill, Iowa State University - Hancock County Extension Education Director, from information prepared by Dale M. Studt, retired ISU Extension Crop Production Specialist.

Author:JHHill Date:10/16/2007

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