Which of the following pheromones is involved in sexual reporduction is silk moth ?

Options

A. Civetone
B. Bombykol
C. Ecdysone
D. Villikinin

Answer

**Step-by-Step Solution:**

1. **Understanding Pheromones**: Pheromones are chemical substances produced by one organism that influence the behavior of another organism, typically for communication purposes, such as attracting mates.

2. **Identifying the Question**: The question specifically asks for the pheromone involved in sexual reproduction in the silk moth.

3. **Analyzing the Options**:
- **Option A: Civetone** - This is a pheromone produced by the African civet, not related to silk moths. Therefore, it is incorrect.
- **Option B: Bombicol** - This is a pheromone produced by female silk moths to attract male silk moths for mating. This is the correct answer.
- **Option C: Azithone** - This pheromone is involved in controlling molting in arthropods and is not related to the silk moth's reproduction. Hence, it is incorrect.
- **Option D: Willy Canine** - This pheromone is produced by deuterium after feeding and is not related to silk moths. Thus, it is also incorrect.

4. **Conclusion**: The correct answer is **Option B: Bombicol**, as it is the pheromone that plays a crucial role in sexual reproduction in silk moths.