Which of the following is true about LD50?

The correct answer is that the lower the LD50 number, the more toxic the pesticide. LD50, or lethal dose 50, is a standard measure used in toxicology to determine the dosage of a substance that is required to kill 50% of a test population, typically laboratory animals. A lower LD50 value indicates that less of the substance is needed to achieve the lethal effect, which signifies higher toxicity.

This measurement is crucial when assessing the risks associated with pesticide use. It helps applicators and researchers compare the potential dangers of different chemical agents, allowing for more informed decisions regarding safety and environmental impact.

Understanding LD50 values is essential for anyone involved in pesticide management, as it guides safety protocols, application rates, and necessary precautions.