• Anthracnose Leaf Blight
• Northern Leaf Blight
• Eyespot
• Bacterial Leaf Blight or Wilt (Stewart's Wilt)
• Grey Leaf Spot
• Common Rust
• Smut, Common and Head
• Crazy Top Downy Mildew
• Maize Dwarf Mosaic Virus
• Sugar Cane Mosaic Virus
• Wheat Streak Mosaic Virus

Corn Leaf Diseases

Anthracnose

1. Anthracnose lesions	2.Anthracnose lesions	3. Anthracnose lesions	4. Anthracnose lesions
5. Anthracnose lesions	6. leaf spots or ascervuli	7. close-up of ascervuli	8. setae or hair-like structures in ascervuli
9. top die-back

Northern Leaf Blight

1. early infection	2. elliptical lesions	3. Northern leaf blight lesions	4. Northern leaf blight lesions
5. Northern leaf blight lesions	6. Northern leaf blight lesions	7. Northern leaf blight lesions

Eyespot

1. round or oval spots	2. lesions have tan or brown centres	3. translucent halos	4. lesions have brown or purple margins
5. Eyespot lesions	6. Eyespot lesions	7. Eyespot lesions

Bacterial Leaf Blight or Wilt (Stewart's Wilt)

1. bacterial ooze	2. yellow streaks	3. yellow streaks	4. yellow streaks
5. yellow streaks	6. Stewart's wilt symptoms	7. Stewart's wilt symptoms	8. Stewart's wilt symptoms
9. crown rot	10. differences in susceptibility	11. effect on yield	12. Stewart's wilt
13. Stewart's wilt	14. Corn flea beetle is a vector of stewart's wilt	15. cut diseased leaf at base to check for bacterial ooze	16. bacterial ooze from plant

Grey Leaf Spot

1. early symptoms	2. rectangular lesions	3. Grey leaf spot
4. severe infection	5. field view

Common Rust

1. yellow flecks develop first	2. rust pustules breaking through	3. close-up of pustules	4. brick red colour
5. leaf yellowing	6. Rust	7. Rust	8. Rust pustules

Smut, Common and Head

1. Common smut	2. young plants most susceptible	3. galls replace kernels	4. greyish coloured smut balls develop
5. release of spores	6. Common smut	7. Head smut	8. Head smut wire brush symptom

Crazy Top Downy Mildew

1. leafy tissue

2. leafy tissue

3. excessive growth

Maize Dwarf Mosaic Virus

1. spots give mottled or mosaic appearance

2. spots develop into narrow streaks

3. red streaks may develop later

Sugar Cane Mosaic Virus

1. similar to maize dwarf mosaic virus

Wheat Streak Mosaic Virus

1. oval to elliptical spots and yellowish streaks

2. purpling may appear later