Which of the following is a symptom caused by bacterial diseases?

• A. Leaf spots, blights, rots, tumors, wilts
• B. Mosaic patterns
• C. Ring spots
• D. Yellow veins

Answer: (A)

Bacterial diseases in ornamental and turf plants often cause tissue damage and abnormal growth, including leaf spots, blights, rots, tumors, and wilts. Bacteria can create localized lesions on leaves, lead to rapid tissue death (blights), cause soft or water-soaked rots, trigger tumor- or gall-like growths on stems or roots, and clog vascular tissues to produce wilting. These symptoms collectively reflect the ways bacteria damage plant tissues and disrupt water and nutrient movement. In contrast, mosaic patterns and ring spots are more commonly associated with viral infections, and yellow veins are typically linked to nutrient deficiencies or other stresses, not bacteria. So the set of symptoms described—leaf spots, blights, rots, tumors, wilts—best reflects bacterial disease.