Extension Field Crop Pathologist and the coordinator of the IPM program. The views expressed on this site do not reflect Iowa State University.
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ALT Soybean leaves with disease and a soybean stem split to reveal brown pith tissue.
ALT Soybean leaves with disease and a soybean stem split to reveal brown pith tissue.
ALT Orange southern rust spores and pustules on corn leaf.
ALT Southern rust life cycle illustration.
ALT Orange southern rust spores and pustules on corn leaf.
ALT Orange southern rust spores and pustules on corn leaves.
ALT Sudden death syndrome symptoms on soybean leaf. Yellow and brown tissue between leaf veins.
ALT Soybean stems with one showing a dark brown lesion extending up the stem. Indicative of Phytophthora root rot.
ALT Treemap graphic showing proportion of losses for top yield reducing soybean diseases in 2024.
ALT Cercospora leaf blight symptoms include dead and discolored tissue on soybean leaves.
ALT Soybean roots with galls indicative of root knot nematode infection.
ALT Corn leaf with several different diseases on it.
ALT Treemap graphic showing proportion of losses caused by the most important corn diseases.
ALT Particle Table 1 from the 2024 Corn Disease Loss Estimates publication.
ALT Severe southern rust on a corn leaf.
ALT Northern corn leaf blight lesions on corn leaf.
ALT Frogeye leaf spot lesions on soybean leaf.
ALT Dead soybean seedling.
ALT Fusarium head blight on wheat showing orange spores. Image courtesy Craig Grau.