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Microbes In Human Welfare

Question
CBSEENBI12002367
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Which one of the following is an example of carrying out biological control of pests/diseases using microbes?

  • Trichoderma sp. against certain plant pathgens

  • Nucleopolyhedrovirus against white rust in Brassica

  • Bt-cotton to increase cotton yield

  • Lady bird beetle against aphids in mustard

Solution

C.

Bt-cotton to increase cotton yield

Bt cotton is Genetically Modified (GM) cotton which has an incorporated gene extracted from the bacterium Bacillus thuringiensis. This gene codes for Bt toxin in plant tissues which is harmful only to a small fraction of insects, most notably the larvae of lepidopterans, moths, butterflies, beetles, flies, etc and harmless to other forms of life. So, it is used as biological control of pests/diseases.

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