Orchid Diseases: Collar Rot, Southern Blight
Sclerotium
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First Symptom of Sclerotium on Orchid is Leaf Yellowing
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Collar Rot Causes Base of Stem to Turn Creamy Yellow
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Collar Rot Causes Tissue to Brown
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Southern Blight Advancing into Orchid Tissue
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White Fungal Growth on Orchid Stem
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Second Phal Leaf Lost to Southern Blight
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Collar Rot has Girdled the Basal Portion of Orchid
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Sclerotium Kills Phalaenopsis Orchid