Which of the following virus is used for the purpose of organic farming?

Options

A. Baculovirus
B. Influenza
C. Tobacco mosaic virus
D. Retrovirus

Answer

To determine which virus is used for the purpose of organic farming, we can analyze the options provided:

1. **Baculovirus**: This virus is known for its role in biological pest control. It specifically targets insects and is used as a natural insecticide in organic farming. Baculovirus is effective in controlling pest populations without the use of harmful chemicals, making it suitable for organic farming practices.

2. **Influenza**: This virus is responsible for causing flu in humans and does not have any application in organic farming. It is primarily a pathogen affecting animals and humans.

3. **Tobacco Mosaic Virus**: This virus primarily affects plants, particularly tobacco, and causes diseases in them. It is not used in organic farming; rather, it is a plant pathogen that farmers try to manage.

4. **Retrovirus**: Retroviruses, such as HIV, are known for causing diseases in humans and animals. They do not have any relevance to agricultural practices or organic farming.

Based on this analysis, the virus that is used for the purpose of organic farming is **Baculovirus**. It serves as a biological control agent, acting as a natural insecticide, which aligns with the principles of organic farming that avoid synthetic chemicals.

**Final Answer**: Baculovirus