Which symptom is NOT caused by bacterial diseases?

Mildews are primarily caused by fungal pathogens, not bacterial diseases. Fungi thrive in specific environments, often leading to powdery or downy mildew symptoms on plant tissues, which can appear as white or grayish patches. In contrast, blights, leaf spots, and wilting can all result from bacterial infections. Blights typically manifest as rapid tissue death, often starting at the tips or edges of leaves. Leaf spots can appear as small, necrotic areas on the foliage, while wilting generally results from bacterial infections that disrupt water transport in the plant. Understanding the differences between these diseases helps in effective plant management and diagnosis.