Which of the following is not used as a biopesticide

Options

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

Answer

To determine which of the following is not used as a biopesticide, we need to analyze each option provided:

1. **Nuclear Polyhedrosis Virus (NPV)**: This virus is known to infect insects, particularly moths and butterflies. It is used as a biopesticide to control pest populations. Therefore, NPV is a biopesticide.

2. **Xanthomonas campestris**: This bacterium is primarily known for causing diseases in plants, particularly in crops like cabbage and other crucifers. It is not used as a biopesticide; rather, it is associated with plant pathology. Thus, this option is not a biopesticide.

3. **Bacillus thuringiensis**: This bacterium is widely recognized as a microbial biocontrol agent. It produces toxins that are harmful to certain insects, making it a popular choice for use as a biopesticide.

4. **Trichoderma harzianum**: This is a free-living fungus found in soil and root ecosystems. It acts as a biocontrol agent against various plant pathogens, making it effective in managing plant diseases.

Based on this analysis, the option that is not used as a biopesticide is **Xanthomonas campestris**.

**Final Answer**: The correct option is B) Xanthomonas campestris.

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