Question

bacillus thuringiensis is used as
A. Bio fungicide
B. Biopesticide
C. Bio controller
D. Bioweapon

Answer 1

Hint:- B.thuringiensis is the naturally occurring soil bacteria that is used to control the number of insect pests affecting the plants. It consists of toxic which kills the insectS eating it. It mostly kills the caterpillar that feeds on the leaves.

Complete step-by-step solution:-Bio fungicide is a natural fungicide which is environment friendly. They consist of fungi and bacteria which grow in the soil. They help in reducing the diseases in the plants. They kill the plant pathogens. The toxicity of the bio fungicide on humans is low but inhalation of these fungicides can lead to coughing and irritation in the throat. Thus, farmers should use them with safety. During heavy rain application of fungicide increases. It is a good alternative to chemicals.
Biopesticide is a natural pesticide that consists of bacteria that are grown in the soil. Biopesticide is spayed on the plants which get attacked by the moths, caterpillar, and other pests. Biopesticide when ingested by any pest releases a toxic in the gut of the pest which kills them instantly. They are the best alternative that can be used against chemical pesticides.
Biocontrol is a way to control pests using living organisms. A parasite, the predator is introduced into the field of the pest. They then kill the pest by feeding on to them. Some examples of bio-controller are the release of parasite wasps to control aphids.
Bioweapon leads to the biological war which can be caused by the release of viruses, bacteria, infections, insects, and fungi with an intention to kill humans. The most dangerous bioweapons are anthrax, smallpox, ebolavirus, etc.

Note:-
There have been genetically engineered crops which have used Bacillus species in the crop so that separate pesticide is not needed to remove the pest. When a pest infects the crop, the toxic is ingested by the pest which then enters the gut of the insect. The toxin then makes a hole in the gut and then kills the pest.