Research shows that effective sprout control is achieved with more than 2 ppm residue of CIPC on the potato. Below this level sprout control may not be effective. Residue values will decrease over time and will be different for every storage. You need to know how much chemical is on your potatoes, not how much was applied to the storage. Monitoring the residues throughout the storage season can help predict when you need to sell product or apply more chemical.
When you’re ready to sample for CIPC residue analysis, here is a general outline of how to sample. If you’d like advice on when, where, and how often to sample feel free to contact one of our chemists for recommendations!
Identify sampling location(s) in each storage.
- Dig down approximately 0.5 m below pile surface.
- Using a steel probe (such as a screwdriver or temperature probe), remove 4 tubers (or if the tubers are a small variety, remove enough to total approximately 1 kg) from each loacation.
- DO NOT touch sampled tubers with hands or gloves.
- Place samples in a sealed bag.
- Clean probe using an unscented alcohol wipe between sample locations.
Place all sealed bags in a box (insulate package to prevent freezing when necessary).
- Include a Sample Submission Form and all pertinent information for each sample.
- Ship to: DiChlor Analytical Laboratories | 2269 E Commercial St, Suite 100 | Meridian, ID 83642