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Apple scab is caused by...

Apple scab is caused by

A

Puccinia

B

Erysiphe

C

Ustilago

D

Venturia.

Text Solution

AI Generated Solution

The correct Answer is:
**Step-by-Step Solution:** 1. **Identify the Disease**: The question asks about the cause of "apple scab," which is a disease that affects apple trees. 2. **Determine the Causative Agent**: Apple scab is specifically caused by a fungus. 3. **Name the Fungus**: The fungus responsible for apple scab is known as **Venturia inaequalis**. 4. **Classify the Fungus**: Venturia inaequalis belongs to the group of fungi called **Ascomycetes**. 5. **Evaluate Other Options**: The question may provide other options for potential causative agents. It is important to evaluate these: - **Option A: Puccinia** - This fungus causes rust diseases, not apple scab. - **Option B: Erysiphe** - This fungus causes powdery mildew, which is not related to apple scab. - **Option C: Ustilago** - This fungus causes loose smut, particularly in barley, and is also not related to apple scab. 6. **Select the Correct Answer**: After evaluating the options, the correct answer is **Option D: Venturia inaequalis**. **Final Answer**: Apple scab is caused by **Venturia inaequalis**. ---
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