In moist conditions, pinkish to yellowish masses of spores appear on spots. Apply fungicide at 7-10 day intervals and more frequently in wet weather. Use fixed or neutral coppers. Xanthomonas vesicatoria or X. campestris 1. Small green to dark brown raised lesions on leaves.
Leaves turn yellow and drop.
Fruit spots rough and blister-like. Bacteria are spread from plant to plant by splashing water. Apply copper materials at 7-10 day intervals, especially in wet weather. Caused by insufficient calcium when fruit are forming. Affected areas at the blossom ends are first water soaked, but soon become dry, light colored and papery.