Question

Which of the following is not used as a biopesticide?

• A. Trichoderma harzianum
• B. Nucleopolyhedrovirus
• C. Xanthomonas campestris
• D. Bacillus thuringiensis

Answer 1

The Correct Option is C

To determine which of the listed options is not used as a biopesticide, we must first understand what a biopesticide is. Biopesticides are derived from natural materials like animals, plants, bacteria, and certain minerals. They are used to control pests sustainably and environmentally friendly.

1. Trichoderma harzianum: This is a fungus that acts as a biocontrol agent and is widely used as a biopesticide. It is effective against fungal pathogens in agriculture.
2. Nucleopolyhedrovirus: This belongs to the Baculovirus group and is utilized as a biopesticide to control insect pests, especially in lepidopteran larvae.
3. Xanthomonas campestris: This is a bacterium known for causing black rot in cruciferous plants. It is not used as a biopesticide; rather, it is a pathogen that affects crops.
4. Bacillus thuringiensis: This is a well-known bacterium used as a biopesticide. It produces toxins that are harmful to insects, making it a staple in pest control.

From this analysis, Xanthomonas campestris is identified as a pathogen rather than a biopesticide. Therefore, the correct answer is Xanthomonas campestris.

This reasoning highlights why Xanthomonas campestris cannot be classified as a biopesticide, as it acts against plant health rather than controlling pests.