What type of signs may need to be posted after pesticide application?

After pesticide application, it is essential to post restricted-entry interval signs. These signs inform employees and anyone entering the treated area about the specific time frame during which entry is restricted to ensure safety. Pesticides often require a certain period, known as the restricted-entry interval (REI), before people can safely return to an area that has been treated. This is crucial for preventing exposure to potentially harmful chemicals and ensuring that proper safety protocols are being followed.

Restricted-entry interval signs communicate vital information pertaining to health and safety, while the other options do not provide relevant or necessary notifications related to pesticide use. For instance, promoting organic products, advertising sales, or providing weather updates does not address the safety concerns that arise after pesticide application and could mislead individuals about the potential hazards present in treated areas.