Powdery growth on leaves and fruit is caused by which group?

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Study for the California Applicator License Category D Plant Agriculture Test. Utilize quizzes with flashcards and comprehensive explanations. Enhance your knowledge and confidence for the examination!

Multiple Choice

Powdery growth on leaves and fruit is caused by which group?

Explanation:
Powdery growth on leaves and fruit is a classic sign of a fungal disease called powdery mildew. The white, powdery coating is made by fungal hyphae and spores that colonize the plant surface. Bacteria cause diseases that show up as spots, ooze, or rots rather than a fine powder. Nematodes produce root or shoot symptoms like galls or knots, not surface powder. Viruses typically create color patterns, mosaics, or stunting, not a powdery film. So the best explanation is that a fungus is responsible for this symptom.

Powdery growth on leaves and fruit is a classic sign of a fungal disease called powdery mildew. The white, powdery coating is made by fungal hyphae and spores that colonize the plant surface. Bacteria cause diseases that show up as spots, ooze, or rots rather than a fine powder. Nematodes produce root or shoot symptoms like galls or knots, not surface powder. Viruses typically create color patterns, mosaics, or stunting, not a powdery film. So the best explanation is that a fungus is responsible for this symptom.

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