Bacterial leaf blight — Tapioca

Symptoms

The primary symptoms are small, angular, brown, water-soaked lesions between leaf veins on lower surfaces of leaves Later the leaf blades turn brown as the lesion expand. Lesions coalesce to form large necrotic patches. Defoliation occurs with leaf petioles remaining in horizontal position as leaves drop. Dieback of shoots, and brown gum formation on stems, leaves and petioles are also seen.