Identification Symptoms

  • The initial symptoms include 1-4 mm diameter wide, dark green water soaked, translucent, linear lesions or stripes along side and parallel to the mid rib of the leaf let of its other main veins
  • The lesions may be developing at any point on the lamina, but more commonly from the base or towards the tip of the leaf let.
  • The margin of the lesions is usually straight and well defined, but occasionally it may appear wavy.
  • The lesions are covered with abundant bacterial exudates on the lower surface. The exudate is creamy white and slimy.
  •  On drying, it forms a waxy film or creamy white or yellowish flakes or fine granules or irregular yellowish masses.
  •   In the advanced stages, the lesions may measure 1cm or more wide and several centimeters long involving the midrib also.
  • The affected midrib and veins of the leaflet get discolored and turn black.
  • All the leaflets of leaf may be affected resulting in complete or partial blighting of the leaf and in severe cases the entire crown may be killed particularly in seedling