Powdery mildew of wheat is caused by

Options

A. Ustilago
B. Erysiphe
C. Albugo
D. Puccinia

Answer

To answer the question "Powdery mildew of wheat is caused by," we will follow these steps:

### Step 1: Identify the Disease
- The disease in question is "powdery mildew," which is a common fungal infection affecting various plants, including wheat.

### Step 2: Understand the Causative Agent
- Powdery mildew is specifically caused by fungi. It is important to know the specific genus and species responsible for this disease.

### Step 3: Analyze the Options
- The options provided are:
1. Osteolago
2. Erysiphe
3. Albugo
4. Paxinia

### Step 4: Recall the Correct Fungal Genus
- Among the options, Erysiphe is known to be the genus that includes fungi responsible for powdery mildew, particularly in cereals like wheat.

### Step 5: Confirm the Family
- Erysiphe belongs to the family Erysiphaceae, which is known for its pathogenic members that cause powdery mildew in various plants.

### Step 6: Conclude the Answer
- Therefore, the correct answer to the question is **Erysiphe**.

### Final Answer:
Powdery mildew of wheat is caused by **Erysiphe**.

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