Pesticides with high LD50 values are considered:

Pesticides with high LD50 values are considered less toxic because the LD50, which stands for "lethal dose 50," indicates the amount of a substance required to kill 50% of a test population, typically laboratory animals. A higher LD50 value means that a larger dose of the pesticide is needed to achieve this level of lethality, suggesting that the pesticide is less toxic to organisms when compared to those with lower LD50 values.

In essence, as the LD50 increases, the toxicity of the pesticide decreases, indicating that it poses a lower risk to both humans and wildlife when used according to label directions. When evaluating the safety and potential hazards of pesticides, understanding the LD50 value is fundamental, and thus, a high LD50 indicates a lower concern for toxicity, making the choice that associates high LD50 values with being less toxic very accurate.