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Question

Which of the following is not used as a biopesticide?


A

Bacillus thuringiensis

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B

Xanthomonas campestris

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C

Nuclear Polyhedrosis Virus (NPV)

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D

Trichoderma harzianum

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Solution

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.


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