Sunflowers
Symptom Cause  
Seed heads damaged
Birds
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Flowers and seeds damaged
Caterpillar of Sunflower Moth
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Plant stems rot at soil line
Damping-Off
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Pale areas or yellow spots on leaves
Leaf Spot
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White powder coats top of leaves
Powdery Mildew
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Pale yellow spots on leaves; reddish brown pustules underside of spots
Rust (on plants)
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Seed heads damaged
Squirrels
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Mottling, yellowing, wilting upward, brown areas on stem when flowering
Verticillium Wilt
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