Bacterial spot

摘要

Symptoms can appear on all above ground parts of the plant. The first symptoms observed on the leaves are dark, water-soaked, circular spots that are less than 3 mm in diameter. The spots become angular and the surface may appear greasy with a translucent center and a black margin. The centers of these lesions soon dry and crack and a yellow halo may surround the lesion. Lesions tend to be more numerous in the young foliage. During periods of high moisture (heavy rain, fog or dew) leaves will take ona blighted appearance rather than the typical leaf spots. Fruit infection begins as small, black, raised specks which may be surrounded by a white halo that has a greasy appearance. These lesions can enlarge to 4-5 mm (0.25 inch) in diameter and becomebrown, slightly raised and scabby in appearance. They can also have raised margins and be sunken in the center.