SPCB Branch 2 Field Representative – Safety/Regulatory Practice Exam

The term LD50 refers to "Lethal Dose for 50% of the population." It is a standard measure used in toxicology to assess the toxicity of a substance, including pesticides. Specifically, it indicates the dose of a chemical that is lethal to half of a tested population, usually represented in milligrams of substance per kilogram of body weight (mg/kg). This measurement is crucial in evaluating the safety and potential risks associated with pesticide application.

Understanding LD50 helps in comparing the toxicity levels of different pesticides and determining appropriate application rates to minimize harm to non-target organisms, including humans. A lower LD50 value indicates a more toxic substance, thus highlighting the importance of proper handling, application, and safety precautions when working with pesticides. This knowledge is essential for ensuring safe and effective pest management.