Disease Cycle of Citrus Canker : Bacteria gain entrance to the host through stomata, lenticels, and wound. They perennate in the affected host tissue. The inoculum is disseminated by wind rains and sometimes by insects. But the disease is commonly disseminated through infected nursery stock. In canker , leaves are not distorted. Lesions are typically circular with yellow halo; appear on both sides of leaf, severe in acid lime (difference from scab) When lesions are produced on twigs, they are girdled and die. On fruits, canker lesions reduce market value. Citrus canker is a disease affecting Citrus species caused by the bacterium Xanthomonas citri. Infection causes lesions on the leaves, stems, and fruit of citrus trees, including lime, oranges, and grapefruit. Symptoms of Citrus Canker : The disease affects all above-ground parts of the tree, but most susceptible a.re the leaves, twigs and fruits. It particularly produces scabby lesion on the surface
