True or False: All licensed applicators must be certified in each application category in which they practice.

The statement is true because all licensed applicators are indeed required to be certified in each application category in which they practice. This certification ensures that the applicators have the necessary knowledge and skills to handle specific types of pesticides safely and effectively. The requirement for certification across all categories helps to maintain safety standards, protect public health, and ensure environmental protection. Each application category reflects a different level of risk and type of pesticide usage, thus necessitating thorough training and certification in those specific areas. This requirement is essential to ensure that licensed applicators can make informed decisions based on their training and the legal frameworks governing pesticide use.