What is the result of genetic modification in crops that produce Bt...

The genetic modification of crops to produce Bt toxin results in reduced reliance on chemical pesticides. This is because the Bt toxin provides resistance to insects, reducing the need for insecticides.

Some of the applications of biotechnology in agriculture that you will study in detail are the production of pest resistant plants, which could decrease the amount of pesticide used. Bt toxin is produced by a bacterium called Bacillus thuringiensis (Bt for short). Bt toxin gene has been cloned from the bacteria and been expressed in plants to provide resistance to insects without the need for insecticides; in effect created a bio-pesticide. Examples are Bt cotton, Bt corn, rice, tomato, potato and soyabean etc.