When should a pesticide be applied?

Applying pesticides should always be done during specified conditions as indicated on the label. This is because pesticide labels contain critical information about the appropriate application conditions to ensure both effectiveness and safety. For example, some pesticides may be most effective at specific temperatures, humidity levels, or wind speeds. Additionally, the label may include restrictions regarding application during certain weather conditions to prevent runoff, drift, or potential harm to non-target organisms, including beneficial insects and water sources. Following the label recommendations helps ensure compliance with regulations as well as optimizing pest control results and protecting the environment.

The other options, while they may seem reasonable in certain situations, do not capture the crucial aspect of adhering to label instructions, which are designed to inform users of the safest and most effective practices.