Orchid Diseases: Black Rot
Pythium and Phytophthora
Image 1
Black Rot on Cattleya Leaf and Pesudobulb
Image 2
Discoloration from Black Rot Moving Up Pseudobulb
Image 3
Pseudobulb Turns Creamy Yellow as Black Rot Progresses Upward into Leaf
Image 5
Black Rot Visible at Base of Pseudobulb
Image 6
Black Rot Visible at Base of Pseudobulb
Image 7
Leaf Yellows from the Base as Black Rot Moves Up the Pseudobulb