Bacterial Spot (Xanthomonas Leaf Spot): Caused by Xanthomonas campestris pv. cannabis, this disease affects cannabis, hops, cucurbits, and legumes in various regions of the United States. Symptoms begin as pin–sized, water–soaked spots that enlarge into irregular, angular lesions. As the disease progresses, the lesions become brown and necrotic with distinct yellow halos, potentially causing significant damage
to affected plants.
