Experimental use permits required under Section 5 of FIFRA can be used when conducting experimental field tests on new pesticides on:

The answer is based on the specific requirements set forth by the Federal Insecticide, Fungicide, and Rodenticide Act (FIFRA) regarding experimental use permits. Under FIFRA, an experimental use permit is necessary when conducting trials on new pesticides to ensure that testing is performed safely and with adequate oversight.

The criteria for these experimental use permits specify that they can be used for trials conducted on 10 or more acres of land or on 1 or more acres of water. This allows for a controlled environment to test the efficacy and safety of the pesticide under various agricultural or aquatic conditions, ensuring compliance with environmental safety standards. Trials involving these minimum areas help in gathering sufficient data for regulatory review processes.

This provision serves to ensure that the tests are relevant and provide a good representation of the potential use of the pesticide in larger agricultural practices or water bodies, something that cannot be achieved reliably with smaller test areas. Therefore, utilizing an experimental use permit on at least 10 acres of land or 1 acre of water aligns with the regulatory framework designed to protect both public health and the environment during the development of new pesticide products.