Which of the following can lead to denial, suspension, or revocation of a pesticide license?

False or fraudulent claims about pesticide effects can lead to serious consequences such as the denial, suspension, or revocation of a pesticide license. This is primarily because such claims undermine the integrity of pesticide regulation and can result in misuse or misapplication, potentially leading to harm to human health or the environment. The pesticide industry operates under strict guidelines to ensure safety and efficacy, and making unsubstantiated claims directly challenges these standards. Regulatory bodies need to maintain trust, and ensuring that licensure is granted only to those who adhere to truthful representations is essential in safeguarding public welfare and environmental integrity.

The other options do not carry the same level of risk to licensing. For instance, providing timely records of pesticide use is generally viewed as a responsible and compliant action, while decisions regarding organic pesticides and communications with unlicensed applicators might be subject to regulatory oversight but do not necessarily invoke the same level of deceit or harm associated with making false claims.