What chemical was historically used for termite control but is now banned?

• A. Malathion
• B. Chlordane
• C. Pyrethrin
• D. Boric Acid

Answer: (B)

Chlordane is recognized as a chemical that was historically employed for termite control but is now banned. It is a synthetic pesticide that was extensively used in the mid-20th century due to its effectiveness against various pests, including termites. However, over time, studies revealed that chlordane posed significant health risks to humans and wildlife, contributing to its eventual prohibition in many countries, including the United States.

The ban on chlordane reflects a growing awareness of the potential long-term environmental and health impacts associated with persistent organic pollutants. Unlike chlordane, other chemicals mentioned have different use cases or less severe environmental implications. For instance, malathion is still used for certain agricultural applications, pyrethrin is a natural insecticide derived from chrysanthemum flowers still utilized for various pest control needs, and boric acid, while used in pest control, is often regarded as a safer alternative. The shift in pest control practices highlights the importance of using safer and more environmentally friendly chemical options in modern pest management strategies.