English Ivy (Hedera) Diseases
|Bacterial leaf spot (p. 158)||Circular, dark-brown to black spots with yellow halos develop on leaves. Leaves yellow, die, and fall.||Xanthomonas campestris pv. hederae||Purchase plants free of the disease. Discard infected plants. Water in a manner that keeps the surface of the leaves dry. Apply a bactericide to protect leaves.|
|Fungal leaf spot||Large, irregularly shaped, tan to brown spots have numerous, tiny dark-brown dots (fruiting structures) within them.||Colletotrichum trichellum||Purchase plants free of the disease. Discard infected plants. Water in a manner that keeps the surface of the leaves dry. Apply a fungicide to protect leaves.
It is not unusual to have both diseases on the same plant or even on the same leaf.
Bacterial leaf spot on Hedera.
Fungal leaf spot on Hedera. Note the small black dots (fungal fruiting structures within the spots
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