Name: Xanthomonas leaf spot – Bacterial leaf spots/blights and scalds – Xanthomonas spp.
There are many species of Xanthomonas that can infect a large number of nursery crops including plants from Brassiceae, Solanaceae, Cucurbitaceae, philodendron and many other ornamental lines.
The exact symptoms depend on the species infected but often involves small, angular, water-soaked spots on leaves that turn brown and may coalesce. It may also cause a leaf blight that can cause leaves to fall from the plant. On other plants the leaves may develop a V-shaped, yellow area along the leaf margin that turns brown and causes veins to turn black. More