What type of pesticide use requires a permit for possession and use?

The requirement for a permit for possession and use of pesticides is specifically associated with restricted materials. Restricted-use pesticides are those that may pose a greater risk to human health or the environment, and therefore, their use is more tightly regulated. To ensure that these pesticides are used safely and responsibly, a permit system is in place. This system typically involves certain training and certification processes to mitigate potential risks associated with their application.

In contrast, other options, such as all pesticide use and homeowner pesticide use, do not necessitate a permit in the same way restricted materials do. Homeowners often have the ability to use certain pesticides without needing a permit, provided these pesticides are classified as general-use and do not carry the same risks as restricted materials. Organic pesticides, while they have their own regulations, are not specifically restricted in the same manner as restricted-use pesticides and generally do not require permits.