|Bacterial Blight and Stem Rot||Very dark green spots engulf the leaf in a soft rot which smells foul. Infected tissue falls away giving the leaf a tattered appearance. When stems are infected, lower leaves wilt and die.||Erwinia||Purchase plants free of the disease. Discard infected plants and water in a manner that keeps the surface of the plants dry at all times.|
|Bacterial Leaf Spot||Translucent spots on leaf margins become dull green with bright yellow halos. Spot size and shape are limited by leaf veins.||Erwinia, Pseudomonas, Xanthomonas||Purchase plants free from the disease. Discard infected plants. Avoid overhead watering. Apply a bsctericide to protect plants.|
|Myrothecium Leaf Spot||Tan to dark brown leaf spots have concentric rings and fungal fruiting structures.||Myrothecium roridum||Do not apply excessive amounts of nitrogen fertilizer. Protect leaves from wounding. Apply a fungicide to protect plants.|
|Phosphorus Deficiency||Plants are stunted. Lower leaves have dead spots.||Lack of fertilization||Apply a balanced fertilizer solution.|
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