Question

The free-living fungus $Trichoderma$ can be used for

• A. controlling butterfly caterpillars
• B. biological control of plant diseases
  
• C. killing insects
  
• D. producing antibiotics
  

Answer 1

The correct option is B biological control of plant diseases


Role of $Trichoderma$ in agriculture
$Trichoderma$ is the genus of free-living filamentous fungi which act against soil-borne pathogens. Certain fungi belonging to this species forms symbiotic association with the plant roots suppressing the growth of other fungus. They act against soil-borne pathogens (for example, pathogenic fungi or nematode eggs) that attack plants, thus conferring disease resistance to the plants.
It can be appropriately considered as a microbe used in biocontrol of pests and pathogens.


Final answer
(B) biological control of plant diseases