Question

The first bio-insecticide developed on commercial-scale was _____________.

• A. Quinine
• B. DDT
• C. Organophosphate
• D. Sporeine

Answer 1

The correct option is D

Sporeine

The correct option is C.
Explanation of the correct option:

1. The first commercial bioinsecticide made from Bacillus thuringiensis is known as Sporeine.
2. The active ingredient is Bacillus thuringiensis is a toxic protein which gets activated in the alkaline pH of the insects.
3. The protein binds to specific sites and creates pores on the midgut of insects which destroy the pests.

Explanation of the incorrect option:
Option A:
Quinine is the most important drug obtained from the thick bark of different species of Cinchona. It is mainly used in the treatment of Malaria fever.
Option B:
DDT (Dichloro Diphenyl Trichloroethane) is a pesticide which was initially used to combat malaria and insect-borne human diseases.

Option C:
Organophosphates are the most widely used insecticides that poison insects and mammals.

Final answer:
The first bioinsecticide developed on a commercial scale was sporeine.