Sexual stages of pathogens of Blast of Rice and Red Rot of Sugarcane are named respectively

Options

A. Magneporthe grisea and Colletotrichum falcatum
B. Colletotrichum falcatum and Pyricularia oryzae
C. Glomerello tucumanensis and Magneporthe grisea
D. Magneporthe grisea and Glomerella tucumanensis .

Answer

To answer the question regarding the sexual stages of the pathogens of Blast of Rice and Red Rot of Sugarcane, we can follow these steps:

### Step-by-Step Solution:

1. **Identify the Pathogen of Rice Blast:**
- The pathogen responsible for the blast disease in rice is **Magnaporthe grisea**. This fungus causes lesions on various parts of the rice plant, including leaves and seeds.

2. **Determine the Sexual Stage of Magnaporthe grisea:**
- The sexual stage of Magnaporthe grisea is known as **Pyricularia oryzae**. However, in the context of the question, it is important to note that the sexual spores are produced in the ascus.

3. **Identify the Pathogen of Red Rot of Sugarcane:**
- The pathogen causing red rot in sugarcane is **Colletotrichum falcatum**. This fungus leads to the appearance of red tissues in the sugarcane plant.

4. **Determine the Sexual Stage of Colletotrichum falcatum:**
- The sexual stage of Colletotrichum falcatum is referred to as **Glomerella tucumanensis**. This stage is crucial in the life cycle of the pathogen.

5. **Conclude the Answer:**
- Therefore, the sexual stages of the pathogens for the blast of rice and red rot of sugarcane are:
- **Blast of Rice:** Magnaporthe grisea
- **Red Rot of Sugarcane:** Glomerella tucumanensis

### Final Answer:
The sexual stages of the pathogens of Blast of Rice and Red Rot of Sugarcane are named respectively as **Magnaporthe grisea** and **Glomerella tucumanensis**.