What is the typical appearance of Powdery Mildew on plants?

The typical appearance of Powdery Mildew on plants is characterized by white powdery spots. This fungal disease manifests as a white, flour-like coating that appears on the leaves and stems, often starting with small patches that can expand and cover larger areas as the infection progresses. The presence of these white spots indicates the fungus feeding on the plant's tissue, which can lead to reduced photosynthesis, weakened plants, and, ultimately, decreased plant vigor and yield. Recognizing this characteristic appearance is crucial for timely management and treatment, helping to mitigate the impact of the disease before it spreads further.

The other options represent symptoms of different plant diseases or conditions. Dark, wet lesions are often indicative of fungal or bacterial infections that cause rot. Yellow, wilted leaves could indicate issues such as nutrient deficiencies or overwatering, leading to stress or decline in plant health. Streaked, brown patches might suggest issues related to leaf spot diseases or environmental stress. Understanding the specific symptoms associated with various plant ailments allows for better diagnostics and targeted treatments.