Under USDA Organic regulations, organic farmers are required to adhere to strict guidelines regarding the use of pesticides. The specific timeframe for pesticide use varies depending on the type of crop being grown.
For crops labeled as "organic," synthetic pesticides are prohibited for a minimum of three years prior to harvest. This is to ensure that the soil and crop are free from the residues of prohibited substances. However, there are exceptions and nuances based on specific circumstances, such as when a field has been transitioned from conventional to organic farming practices.
It's important for organic farmers and producers to consult the USDA Organic regulations and work closely with certifying agents to ensure compliance with all requirements. These regulations may be updated periodically, so it's essential to stay informed about any changes or updates to the standards.
Resources:
https://www.usda.gov/media/blog/2012/03/22/organic-101-what-usda-organic-label-means#:~:text=Produce can be called organic,most synthetic fertilizers and pesticides.
https://www.ecfr.gov/current/title-7/subtitle-B/chapter-I/subchapter-M/part-205/subpart-C/section-205.206
https://www.ecfr.gov/current/title-7/subtitle-B/chapter-I/subchapter-M/part-205/subpart-G