Question

Which of the following is not used as a biopesticide?

• A. Bacillus thuringiensis
• B. Xanthomonas campestris
• C. Nuclear Polyhedrosis Virus (NPV)
• D. Trichoderma harzianum

Answer 1

The correct option is B

Xanthomonas campestris

The correct option is B.

Explanation of the correct answer:

1. Xanthomonas campestris is a gram-negative bacteria.
2. It causes black rot in plants.
3. It is not used as a biofertilizer.

Explanation of the incorrect options:

Option A:

1. Bacillus thuringiensis is a biocontrol agent.
2. It forms protein crystals that contain a toxic insecticidal protein.
3. This protein is activated only when an insect ingests it, leading to its death.

Option C:

1. NPV affects moths and butterflies.
2. It is used as a pesticide.

Option D:

1. Trichoderma harzianum is a free-living fungus.
2. It stops the growth of pathogenic microorganisms in plants.

Final answer: Xanthomonas campestris is not used as a biopesticide.