Early bilght of Potato is caused by

Options

A. Alernaria solani
B. Phytopthora infestans
C. Phytopthora palmivora
D. Cercospora personata

Answer

### Step-by-Step Solution

1. **Identify the Disease**: The question asks about the cause of early blight in potatoes. It's important to recognize that there are two types of blights that affect potatoes: early blight and late blight.

2. **Understand the Options**: The options provided likely include different pathogens. We need to determine which pathogen is responsible for early blight.

3. **Recognize the Pathogen**: The correct answer to the question is *Alternaria solani*. This is a fungal pathogen that is known to cause early blight in potatoes.

4. **Mechanism of Spread**: *Alternaria solani* spreads by producing conidia, which are asexual spores. These spores can germinate under certain conditions.

5. **Optimum Conditions for Germination**: The germination of conidia requires specific environmental conditions, primarily high moisture and optimal temperature. These conditions allow the fungus to thrive and initiate infection.

6. **Infection Process**: Once the conidia germinate, they form a germ tube that can penetrate the potato plant through the epidermis or stomata, leading to the development of early blight symptoms.

7. **Conclusion**: Therefore, the early blight of potato is caused by the fungus *Alternaria solani*.