Which one of the following is an example of carrying out biological control of pests/diseases using microbes?

Bt-cotton to increase cotton yield

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Lady bird beetle against aphids in mustard

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Trichoderma sp. against certain plant pathogens

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Nucleopolyhedrovirus against white rust in Brassica

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Solution

The correct option is C
Trichoderma sp. against certain plant pathogens

Of the given options, Trichoderma sp. against certain plant pathogens is an example of microbes carrying out biological control of pests/diseases.
Trichoderma harzianum is a fungus that is also used as a fungicide. It is used for foliar application, seed treatment and soil treatment for suppression of various disease-causing fungal pathogens.

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