October 4, 2020
Here is an overview of corn diseases throughout the season.
Scouting for Corn Diseases
| Early Season Emergence to knee-high |
| Seeding Blights |
| Anthracnose Leaf Blight, Bacterial Wilt and Bacterial Leaf Blight (Stewart’s Wilt, Stewart’s Disease), Goss’s Wilt, Physoderma Brown Spot, Common Smut, High Plains Virus |
| Mid Season Knee-high to tasseling |
| Anthracnose Leaf Blight, Bacterial Wilt and Bacterial Leaf Blight (Stewart’s Wilt, Stewart’s Disease), Goss’s Wilt, Physoderma Brown Spot, Common Smut, High Plains Virus |
| Northern Leaf Blight, Southern Leaf Blight, Common Rust, Southern Rust, Crazy Top, Sorghum Downy Mildew, Anthracnose Top Dieback & Stalk Rot, Bacterial Stalk Rot, Pythium Stalk Rot, Maize Chlorotic Dwarf Virus, Maize Dwarf Mosaic Virus, Corn Lethal Necrosis, Eyespot, Tar Spot |
| Late Season Tasseling to maturity |
| Anthracnose Leaf Blight, Bacterial Wilt and Bacterial Leaf Blight (Stewart’s Wilt, Stewart’s Disease), Goss’s Wilt, Physoderma Brown Spot, Common Smut, High Plains Virus |
| Northern Leaf Blight, Southern Leaf Blight, Common Rust, Southern Rust, Crazy Top, Sorghum Downy Mildew, Anthracnose Top Dieback & Stalk Rot, Bacterial Stalk Rot, Pythium Stalk Rot, Maize Chlorotic Dwarf Virus, Maize Dwarf Mosaic Virus, Corn Lethal Necrosis |
| All Ear & Kernel Rots |
| Gray Leaf Spot, Head Smut, Charcoal Rot, Diplodia Stalk Rot, Fusarium Stalk Rot, Gibberella Stalk Rot, Red Root Rot |
Leaf Diseases
Physoderma Brown Spot
Anthracnose Leaf Blight
Stewart's Bacterial Leaf Blight
Gray Leaf Spot
Southern Corn Leaf Blight
Eyespot
Southern Rust - Front Surface
Southern Rust - Back Surface
Southern Rust - Back Surface
Tar Spot
Ear Rots
Diplodia Ear Rot
Gibberella Ear Rot
Aspergillus Ear Rot
Aspergillus Ear Rot
Smut/Virus/Fungal Systemic Diseases
Corn Lethal Necrosis
Maize Chlorotic Dwarf Virus
Maize Dwarf Mosaic Virus
High Plains Virus
Crazy Top
Stalk & Root Rots
Anthracnose Stalk Rot
Charcoal Rot
Gibberella Stalk Rot
Fusarium Stalk Rot
Red Root Rot
Red Root Rot
Diplodia Stalk Rot
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