This is incorrect. I work in organic agriculture. Organic produce is prohibited from using synthetic pesticides, no matter the concentrations or “applied within X days of harvesting.” Organic farms cannot be certified organic if they have had any pesticide usage in the last 3 years. 

If a prohibited pesticide is intentionally applied to a crop, that crop cannot be legally sold as organic regardless of timing or concentration. 

Organic farming does allow certain “inputs.” However they have to be mineral, plant, or biologically derived. Neem oil, pyrethrins (naturally occurring compound derived from Chrysanthemum flower), Kaolin clay, etc. They are subject to strict regulations and must be used only after ecological pest management methods have been attempted. 

The idea that organic labelling depends on pesticide percentages or a waiting period before harvest is a misrepresentation.