- Leaves wilt, turn yellow and eventually turn brown and die
- Yellow V-shaped lesions develop on margin of leaves, the point of the v follows a vein towards the base of the leaf
- Black veins can be seen in infected leaves, petioles and stems
- Sticky yellowish liquid bacterial ooze may be seen if infected veins are cut
- Disease favored by hot, humid conditions
- Cauliflower head turns uniformly brown when infected
- More information on Black rot...