What for nucleopolyhedro viruses are being used now a-days?

Explanation

### Step-by-Step Solution:

1. **Identify the Type of Virus**: Nucleopolyhedroviruses belong to the family of Baculoviruses. They are specifically known to infect insects.

2. **Understand the Application**: These viruses are primarily utilized in the agricultural sector.

3. **Role as Biopesticides**: Nucleopolyhedroviruses are used as biopesticides. This means they are employed to control pest populations, particularly those that damage crops.

...