Orchid Diseases: Black Rot
Pythium and Phytophthora



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Black Rot on Cattleya Leaf and Pesudobulb
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Discoloration from Black Rot Moving Up Pseudobulb
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Pseudobulb Turns Creamy Yellow as Black Rot Progresses Upward into Leaf
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Black Rot Visible at Base of Pseudobulb
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Black Rot Visible at Base of Pseudobulb
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Leaf Yellows from the Base as Black Rot Moves Up the Pseudobulb