Director of the PennState Southeast Research & Extension Center and Assoc. Prof. in field crops pathology. She/her @pacropdoc on the sky that is blu. Need code?
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ALT Infographic representing an acre of corn showing that 7% of corn was reduced by disease in 2025. Southern rust caused the greatest losses, followed by tar spot and several other diseases.
ALT Treemap showing proportion of corn losses caused by disease. Southern rust caused the greatest losses.
ALT Corn leaf with orange southern rust spores and dead tissue.
ALT Corn field showing leaves dying from severe southern rust infection.
ALT Illustration of the Fusarium stalk rot disease cycle demonstrating how the fungus overwinters in corn residue, is spread and infects the plant, and develops within the plant.
ALT Split corn stalk showing degraded pith tissue and pink mold.
ALT Three split stalks on a blue background showing pith that has rotted.
ALT Orange rust pustules on a corn leaf.
ALT Gray spots with reddish borders on soybean leaf.
ALT Orange rust fungus on wheat leaves in a field.
ALT White mold symptoms and signs on a soybean stem.
ALT Screenshot of the Fungicide ROI Calculator for White Mold of Soybean web tool.
ALT Rectangular shaped dead spots on corn leaf symptomatic of gray leaf spot.
ALT Cigar shaped dead spots on corn leaf symptomatic of north corn leaf blight.
ALT Orange spores on corn leaf indicative of southern rust.
ALT Dark spots of fungal growth and dead spots on corn leaf indicative of tar spot.
ALT Wheat leaf with rust spores and dead tissue.
ALT Illustration of disease cycle of Fusarium head blight.
ALT Orange fungal growth indicative of rust on a wheat leaf.
ALT Orange fungal growth on bleached wheat seed heads.
ALT Document with the title "Biological Seed Treatments on Soybeans"
ALT Disease lesions on a corn leaf.
ALT Soybean stem with white mold, sclerotia, and dead tissue.
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 Partial 2025 corn fungicide efficacy table.
ALT Southern rust orange pustules on green corn leaf.
ALT Tar spot dark fungal growth on corn leaf.
ALT Partial table showing efficacy of various pesticides against seedling diseases.
ALT Wilted soybean seedling next to healthy soybean plant surrounded by soil and corn residue.
ALT Crushed corn kernels with and without mold under a black light. Image by Burt Bluhm.
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.
ALT crop scouting icons