Question

Which one of the following is used as a biological insecticide?

• A. Silk Moth
• B. Tiger Beetle
• C. Caterpillar
• D. Mazra poka

Answer 1

The correct option is B

Tiger Beetle

The correct option is B.

The explanation for the correct option:

1. The Tiger beetle is a non-pest insect but itself feeds on other pests.
2. It attacks pests at night.
3. It is used as a biological insecticide.

The explanation for the incorrect options:

Option A:

1. Silk moths are insects used for silk cultivation.
2. It feeds on mulberry plants and produces cocoons around it silk thread.
3. It is not a biological insecticide.

Option C:

1. Caterpillars are a young stage of insects.
2. This stage is a voracious feeder on plant leaves.
3. It is a pest on plants, not an insecticide.

Option D:

1. Mazra poka is a pest in the paddy field.
2. It causes pest infection in grain crops.
3. It is not an insecticide, but itself a pest.

Final answer: Tiger beetle is used as a biological insecticide.