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

  • Option 1)

    Trichoderma sp. against certain plant pathogens

  • Option 2)

    Nucleopolyhedrovirus against white rust in Brassica

  • Option 3)

    Bt - cotton to increase contton yield

  • Option 4)

    Lady bird beetle against aphids in mustard

 

Answers (2)

As we learnt in concept

These are available in sachets as dried spores which are mixed with water and sprayed onto vulnerable plants such as rassicas and fruit trees, where these are eaten by the insect larvae. In the gut of the larvae, the toxin is released and the larvae get killed. The bacterial disease will kill the caterpillars, but leave other insects unharmed.


Option 1)

Trichoderma sp. against certain plant pathogens

This option is incorrect.

Option 2)

Nucleopolyhedrovirus against white rust in Brassica

This option is incorrect.

Option 3)

Bt - cotton to increase contton yield

This option is correct.

Option 4)

Lady bird beetle against aphids in mustard

This option is incorrect.

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