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The earliest pesticide was...

The earliest pesticide was

A

Margosa

B

Pyrethrum

C

Nicotine

D

DDT

Text Solution

AI Generated Solution

The correct Answer is:
**Step-by-Step Solution:** 1. **Identify the Question**: The question asks about the earliest pesticide used by humans. 2. **Review the Options**: The options provided are: - Margosa - Pyrethrum - Nicotine - DDD 3. **Understanding Margosa**: Margosa refers to the neem tree, which has been used historically for its pesticidal properties. The leaves of the neem tree contain compounds that repel pests. 4. **Active Compounds in Neem**: The key compounds found in neem leaves include alkaloids and azadirachtin, which are known for their insect-repelling properties. 5. **Historical Context**: Neem has been used for centuries in various cultures, particularly in India, as a natural pesticide for protecting stored grains from pests. 6. **Comparison with Other Options**: - **Pyrethrum**: A modern pesticide derived from chrysanthemum flowers. - **Nicotine**: A natural insecticide but used more recently. - **DDD**: A synthetic pesticide developed in the 20th century. 7. **Conclusion**: Based on the historical usage and the properties of the compounds, the earliest pesticide is identified as Margosa (neem). **Final Answer**: The earliest pesticide was Margosa. ---
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