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Match the following columns and select the correct option.

MICROBES AS BIOCONTROL AGENTS
NEET
1

a(iv), b(ii), c(iii), d(i)

2

a(iv), b(i), c(ii), d(iii)

3

a(i), b(iii), c(iv), d(ii)

4

a(i), b(iv), c(iii), d(ii)

Solution:

Let's match the organisms in Column-I with their functions/characteristics in Column-II:

a. Trichoderma: This is a genus of fungi that are free-living and common in root ecosystems. They are known to be effective biocontrol agents against several plant pathogens. So, a matches with (iv) 'Common in root ecosystem'.

b. Nucleopolyhedrovirus: These are viruses belonging to the group Baculoviruses. They are used as biocontrol agents because they are pathogens that attack insects and other arthropods. They are species-specific and narrow-spectrum. So, b matches with (i) 'Pathogen that attacks insects'.

c. Ladybird: Ladybird beetles (e.g., the red and black spotted beetle) are beneficial insects known for feeding on aphids, thus controlling their populations. So, c matches with (ii) 'Controls aphids'.

d. Dragonflies: Dragonflies are predatory insects that feed on mosquitoes, especially in their larval and adult stages, helping to control mosquito populations. So, d matches with (iii) 'Control mosquitoes'.

Based on the matching:

a - (iv)

b - (i)

c - (ii)

d - (iii)

This corresponds to option (2).

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