(a)
When applied to growing crops, in accordance with good agricultural practice, the following pesticide chemicals are exempt from the requirement of a tolerance:
(4)
Rotenone or derris or cube roots.
(b)
These pesticides are not exempted from the requirement of a tolerance when applied to a crop at the time of or after harvest.
Code of Federal Regulations
[75 FR 60245, Sept. 29, 2010]