Pest Photo

Purdue Botany and Plant Pathology - photo Kiersten Wise

Corn tar spot

Phyllachora maydis

Corn tar spot (Phyllachora maydis) is a fungal pathogen of corn. It is a native of Mexico, Central and South America and was first detected in Indiana in 2015.

Suitable environmental conditions of temperature, relative humidity and/or rainfall are required for the sequence of infections that results in the blight on maize.

For more information about this plant pest, see the CABI data sheet.
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