First bioinsecticide developed commercially was

Options

A. sporeine
B. devine
C. DDT
D. organophosphate

Answer

To answer the question "First bioinsecticide developed commercially was," we need to analyze the options provided and identify the correct one based on historical context and definitions.

### Step-by-Step Solution:

1. **Understanding Bioinsecticides**:
- Bioinsecticides are natural insecticides derived from microorganisms or plants. They are used to control pest populations while being less harmful to non-target organisms and the environment.

2. **Evaluating the Options**:
- **Option A: Quinine**:
- Quinine is a medication used to treat malaria, not an insecticide. Therefore, this option is incorrect.
- **Option B: DDT**:
- DDT (Dichlorodiphenyltrichloroethane) is a synthetic insecticide known for its environmental persistence and harmful effects on wildlife and humans. It is not classified as a bioinsecticide. Thus, this option is also incorrect.
- **Option C: Organophosphate**:
- Organophosphates are a class of synthetic insecticides that inhibit the enzyme acetylcholinesterase, affecting the nervous system of insects. They are not bioinsecticides, making this option incorrect as well.
- **Option D: Sporeing (Bacillus thuringiensis)**:
- Sporeing refers to the commercial product derived from Bacillus thuringiensis (Bt), a bacterium that produces toxins harmful to certain insects. It is indeed the first bioinsecticide developed commercially, introduced in France in 1938.

3. **Conclusion**:
- Based on the analysis, the correct answer to the question is **Sporeing (Bacillus thuringiensis)**.

### Final Answer:
The first bioinsecticide developed commercially was **Sporeing (Bacillus thuringiensis)**.

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