Which one of the following is an example .o f carrying out biological control of pests/dis- eases using microbes

Options

A. Trichodema sp. Against certain plant pathogens
B. Nucleopolydrovirus against white rust in Brassica
C. Bt cotton to increase cotton yield
D. Lady bird beetle against aphids in mustard

Answer

C

Explanation

Out of the given statement 'c' is correct example because 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.