Canker
Crop canker disease is caused by the infection of plants by Xanthomonas flavescens. Once infected, it will greatly affect the quality and yield of crops.
Symptoms:
In the later stage, the disease spots are corked, the edges are raised, and the central depression is ulcer like. Such as citrus canker disease, vegetable soybean bacterial spot disease, tomato fruit bacterial spot disease, etc.
