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

Nucleopolyhedrovirus against white rust in Brassica

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Bt-cotton to increase cotton yield

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Trichoderma sp. against certain plant pathogens

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Lady bird beetle against aphids in mustard

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Solution

The correct option is C Bt-cotton to increase cotton yield
Scientists have now identified the genes for insecticidal crystal proteins. They have isolated these genes from the bacteria and incorporated them into the genetic materials of various crop plants through recombinant technology. Several field crops, such as cotton, rice, tomato, and soybean have been genetically modified in this way to fight against various insect pests. Bt-cotton is one such example, which is being cultivated in many states of our country.

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

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