A pesticide with a high LD50 is considered to be:

A pesticide with a high LD50 value is indicative of low toxicity. The LD50, or "lethal dose for 50% of the population," is a common measure used to evaluate the toxicity of substances, including pesticides. A high LD50 number suggests that a large quantity of the substance must be administered to reach the level that could be lethal to half of the test subjects, thus characterizing the substance as less harmful to humans and other non-target organisms.

Understanding the context of LD50 values is crucial. In contrast, a low LD50 would mean that even a small amount of the pesticide is potentially lethal, classifying it as highly toxic. The concept does not relate to corrosiveness or safety for all uses, as those attributes are determined by other factors such as chemical composition, mode of action, and environmental impact. Therefore, a high LD50 clearly categorizes a pesticide as low in toxicity, making it more favorable for use in environments where safety is a consideration.