What criterion should be met for pesticide application communication according to the IPM?

The correct choice emphasizes that when using the least-risk pesticides in an Integrated Pest Management (IPM) program, there is no requirement for formal notifications to occupants. This aligns with the principles of IPM, which prioritize minimizing risks to human health and the environment. The rationale behind this is that least-risk pesticides typically pose lower hazards compared to traditional chemical pesticides.

In an IPM context, the use of these safer alternatives aims to strike a balance between effective pest control and the wellbeing of building occupants. Because these pesticides are deemed to carry less risk, it is understood that they are generally safer for individuals who might come into contact with treated areas, thus reducing the need for notifications.

Looking at the other options, they suggest a broader scope that does not fit within IPM guidelines focused on risk assessment and communication. While some form of notification may be necessary for other types of pesticides—especially high-risk ones—the use of least-risk pesticides specifically allows for relaxed communication requirements as a recognition of their lower impact on health and safety.