Question

A common biocontrol agent for the control of plant diseases is?

• A. Trichoderma.
• B. Glomus
• C. Bacillus thuringiensis
• D. Baculovirus

Answer 1

The correct option is A

Trichoderma.

The correct option is A.

Explanation of correct option:

1. In agriculture, a biocontrol agent refers to a living organism that helps to combat plant diseases.
2. They are cost-effective and don’t kill useful organisms.
3. A common biocontrol agent used for the control of plant diseases is Trichoderma.
4. Trichoderma is free-living fungi that grow on plant roots.
5. They form a symbiotic relationship with the plant and prevent infection caused by other fungi.
6. Trichoderma is widely used to prevent several plant diseases such as root rot, blight, wilts, etc.

Explanation of incorrect option:

Option B:

1. Glomus is a fungus that helps in nitrogen fixation.
2. They are commonly used as biofertilizers.

Option C:

Bacillus thuringiensis is a soil bacterium used as an insecticide.

Option D:

Baculovirus is a DNA virus that is commonly used to kill insects.

Final answer: A common biocontrol agent for the control of plant diseases is Trichoderma.