Ask a Specialist Answer
Can I purchase a used conventional sprayer for use in my organic production?
Yes, you can purchase and use this sprayer. However, you will need to perform some cleaning and refurbishment activities and document these before you may use it on organic land.
Most certifiers recommend a clear water rinse first. Completely fill the tank and spray it until empty on non-organic land. Second, fill the tank again with diluted household ammonia, such as one quart of ammonia per 125 gallons. Run this through the sprayer again on non-organic land. Perform another clear water rinse as above. If you continue to smell the residues of the prohibited chemicals, do another ammonia and clear water rinse again. Poly tanks are porous so you may need to repeat this procedure a few times.
Replace all rubber parts including hoses, washers, and nozzles with new ones, as these are very difficult to clean completely.
Many certifiers require that once you have converted this piece of equipment from non-organic to organic production, you can no longer use it for spraying prohibited materials. In other words, if you are sharing this piece of equipment with a non-organic farmer, or you manage split production on your own farm, you may need to dedicate this sprayer, once cleaned, to organic and not go back and forth between organic and non-organic use, even if you perform this cleaning activity each time. Check with your certification agency on its policy for sprayer use to see if it mandates dedication to organic.
Posted: Jan 2008
Answer By: Harriet Behar