The Question is from neet-zoology microbes-in-human-welfare , and it was created by the author K SUNKANNA

Question

Which of the following is commonly employed as a biocontrol agent against plant diseases?

K SUNKANNA · Accepted Answer

## CORE INFORMATION
✓ **Answer**: B. Trichoderma
## CONCEPT FRAMEWORK
 **Primary Concept**: Biocontrol agents in plant disease management
 **Related Topics**:  Microbial ecology, plant pathology, sustainable agriculture
 **Prerequisites**: Basic understanding of plant diseases and their management.
## SOLUTION PATHWAY
**Given Information**:
  The question asks for a biocontrol agent commonly used against plant diseases.
**Method & Steps**:
 1. Identify the options provided.
  Reasoning: Evaluate each option based on its known properties and applications.
 2. Analyze each option for its effectiveness as a biocontrol agent.
  Working: 
            * Bacillus thuringiensis (Bt): Primarily used as an insecticide, not a broad-spectrum biocontrol agent against fungal plant diseases.
            * Trichoderma: A well-known genus of fungi used extensively as a biocontrol agent against various plant fungal pathogens.
            * Agrobacterium tumefaciens: A plant pathogen, not a biocontrol agent.
            * Aspergillus niger:  Can be a plant pathogen in some contexts, not typically used as a biocontrol agent.
 3. Select the option that is most commonly and effectively used as a biocontrol agent.
  Result: Trichoderma (B)
  Verification: Trichoderma's mycoparasitic nature and production of antifungal compounds support its effectiveness as a biocontrol agent.
 ## OPTION ANALYSIS
A :x: Bacillus thuringiensis is primarily a bacterial insecticide.
B ✓: Trichoderma is a well-established biocontrol agent against various plant diseases.
C :x: Agrobacterium tumefaciens is a plant pathogen, causing crown gall disease.
D :x: Aspergillus niger is a fungus, often found as a contaminant, not typically used as a biocontrol agent.
 ## LEARNING AIDS
 **Common Mistakes**: Selecting a pathogen instead of a biocontrol agent.
 **Quick Tips**: Remember that Trichoderma is a widely used biocontrol fungus.

K SUNKANNA · Answer

Bacillus thuringiensis

K SUNKANNA · Answer

The correct Option is "Trichoderma"

K SUNKANNA · Answer

Agrobacterium tumefaciens

K SUNKANNA · Answer

Aspergillus niger

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