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Microbes In Human Welfare

Question
CBSEENBI12047424
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Which one of the following organisms is not used as a biocontrol agent?

  • Bacillus sphaericus

  • Trichoderma viride

  • Bacillus thuringiensis

  • Bacillus subtilis

Solution

D.

Bacillus subtilis

Bacillus subtilis is a Gram-positive bacteria found in soil and the gastrointestinal tract of ruminants and humans. It is not used as a biocontrol agent.

Bacillus sphaericus is used as a biocontrol agent.

Trichoderma species are free- living fungi that are very common in the root ecosystems. They are effective biocontrol agents of several plant pathogens.

Bacillus thuringiensis is used to control butterfly caterpillars. They are available in sachets as dried spores and are mixed with water and sprayed onto vulnerable plants such as brassicas and fruit trees.

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