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

• A. 10 or more acres of land and 1 or more acres of water
• B. 5 acres of land and 0.5 acre of water
• C. 1 acre of land and no water
• D. Any size field with access to water

Answer: (A)

Under FIFRA Section 5, experimental use permits are used to conduct field tests of pesticides that aren’t yet registered or are being tested for new uses, but only in settings large enough and controlled to yield meaningful data and protect the environment. The best choice specifies minimum sizes that reflect this field-scale requirement: at least 10 acres of land and at least 1 acre of water. This ensures the test covers both terrestrial and aquatic aspects and provides a robust data set for evaluating efficacy, crop safety, and environmental impact under regulatory oversight. Smaller tests, such as those on a few acres of land or without any water area, would not meet the standard scale for an experimental permit. Allowing any size field with access to water would bypass the thoughtful thresholds designed to balance data quality with environmental safeguards.