Which symptom is not typically associated with viral infection?

Which symptom is not typically associated with viral infection?

• A. Mosaic patterns
• B. Yellow veins
• C. Leaf spots due to bacterial infection
• D. Ring spots

Answer: (C)

Viral infections in ornamental and turf plants tend to cause systemic changes that alter leaf color and pattern, such as mosaic mosaics, rings, or mottling, and can include leaf curling or stunting. Bacterial infections, on the other hand, typically produce localized leaf spots with defined margins, often angular, sometimes with water-soaked areas or halos around the spots. Those bacterial leaf spots are not a typical presentation of viral disease. So, the symptom described as leaf spots caused by bacterial infection does not fit the common viral symptom profile, making it the best choice.

Viral infections in ornamental and turf plants tend to cause systemic changes that alter leaf color and pattern, such as mosaic mosaics, rings, or mottling, and can include leaf curling or stunting. Bacterial infections, on the other hand, typically produce localized leaf spots with defined margins, often angular, sometimes with water-soaked areas or halos around the spots. Those bacterial leaf spots are not a typical presentation of viral disease. So, the symptom described as leaf spots caused by bacterial infection does not fit the common viral symptom profile, making it the best choice.