Q.

Go through following matches with respect to biocontrol agents, and select the correct option.A. Ladybird beetle - AphidsB. Dragonflies - MosquitoesC. Bacillus thuringiensis - Butterflies/caterpillarsD. Trichoderma - Several plant pathogens

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a

Only A and B are correct.

b

Only C is correct.

c

Only D is correct.

d

All A, B, C and D are correct.

answer is D.

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Detailed Solution

Ladybird and Dragonflies are useful to get rid of aphids and mosquitoes, respectively and to control butterfly caterpillars the bacteria Bacillus thuringiensis is used, Trichoderma species are free-living fungi that are very common in the root ecosystems. They are effective biocontrol agents of several plant pathogens.
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Go through following matches with respect to biocontrol agents, and select the correct option.A. Ladybird beetle - AphidsB. Dragonflies - MosquitoesC. Bacillus thuringiensis - Butterflies/caterpillarsD. Trichoderma - Several plant pathogens