Gray spots of oat are caused due to deficiency of

Options

A. Cu
B. Zn
C. Mn
D. Fe

Answer

**Step-by-Step Solution:**

1. **Identify the Problem**: The question asks about the cause of gray spots on oats, which is a symptom of a nutrient deficiency.

2. **List Possible Nutrient Deficiencies**: The options provided are copper, zinc, manganese, and iron. We need to determine which of these deficiencies leads to gray spots on oats.

3. **Research Nutrient Functions**: Understand the role of each micronutrient:
- **Copper**: Involved in photosynthesis and respiration.
- **Zinc**: Important for enzyme function and protein synthesis.
- **Manganese**: Plays a crucial role in photosynthesis and enzyme activation.
- **Iron**: Essential for chlorophyll synthesis and electron transport.

4. **Connect Symptoms to Nutrient Deficiency**: The gray spots on oats are specifically associated with manganese deficiency. This condition is known as "gray spot disease" in oats.

5. **Describe the Symptoms**: Manganese deficiency leads to:
- Formation of grayish-brown lesions on leaves.
- Development of brown elongated specks and streaks on the plant.
- Poorly developed root systems.

6. **Conclude the Answer**: Based on the information gathered, the gray spots of oats are caused by a deficiency of **manganese**.

**Final Answer**: Gray spots of oats are caused due to deficiency of **manganese**.

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