What is the toxicity classification for "Least toxic"?

The toxicity classification "Least toxic" refers specifically to Category 4. This category is assigned to substances that present minimal risk to human health when used as directed. Pesticides in this category typically have the lowest potential for causing harm upon exposure, which is critical information for pest control technicians when choosing and recommending products for various applications.

In practice, this means that pesticides categorized as Category 4 are often safer options for both applicators and the general public, making them favorable when determining the best pest control strategies, particularly in sensitive environments, such as near homes or schools. Understanding toxicity classifications helps technicians make informed decisions that balance effectiveness against the potential risks to humans and the environment.