Ink painting/drawing of cotton angular leaf spot, caused by the bacterium Xanthomonas citri p.v. malvacearum.

The painting shows a section of a cotton branch with two leaves and one boll (round green fruit). There are brown angular lesions with a darker brown border on the leaves, stem and boll. Some of these lesions have spread along the leaf veins.

Top: photograph

Bottom: scanned image