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WWW.POTATOGROWER.COM 47 hot water and soap, rinsed, and followed with a quaternary ammonium disinfectant application. Commercial storage samples were sampled during the storage season prior to any cleaning. After swabbing, the gauze pads were sealed in plastic bags and immediately shipped to an analytical laboratory for CIPC residue analysis. The residue was reported in parts per million and represents the amount of chemical on the surface of the swabbed area. Cleaning of storages reduced CIPC residue levels on materials to 0.25 to 22 percent of the levels before cleaning. Residue levels were variable depending on the area and material sampled within the storage facility. Concrete areas in the plenum near the CIPC application port generally showed higher residue than the upper catwalk area. Plastic and concrete may have a higher affinity for CIPC residue retention, and additional care may be needed for cleaning. Interpreting the results is more problematic than finding them. Based upon these sampling procedures, cleaned and swabbed storages where seed potatoes were stored and subsequently had normal sprout development typically had CIPC residue levels below 20 parts per million. Cleaning and disinfecting storages using the procedures recommended on the label reduced residue on treated storage walls by 80 to 99 percent and resulted in residue levels that reached below 20 parts per million. This study demonstrated the effectiveness of cleaning in reducing the level of CIPC residues on common materials in storage. This swabbing technique may be used to assess the effectiveness of storage cleaning and airing, and of elapsed time. The technique may also prove useful as a tool for making management decisions on minimizing the potential risk of CIPC exposure with temporary housing of seed. More in-depth information can be found in the University of Idaho publication "Best Practices for CIPC Residue Sampling of Potatoes and Storage Facilities" (www.cals. uidaho.edu/edComm/pdf/BUL/BUL907. pdf). The authors would like to thank the Idaho Potato Commission and the Northwest Potato Research Consortium for funding this research. GENTLE: Separates without damaging peaches, apples, mushrooms and fresh tomatoes. ACCURATE: Precisely grades grape tomatoes, cherries, nuts, and small berries, maintaining that accuracy for larger products including cantaloupes and pineapple. FAST: Thirteen standard models custom-designed to meet your needs sort from 1000 lb/hr to 100,000 lb/hr. SIMPLE: Effective but simple design provides a rugged, low cost, low maintenance machine at a high value to our customers. It can even be used in the field! VERSATILE: Specialized rollers allow for the accurate sizing of round products (potatoes, onions and citrus), long products (carrots, russets, and cucumbers), and irregular products (bell peppers, jalapenos, and garlic). Proven in use for: Round Potatoes, Russets, Goldrush, Reds, Sweet Potatoes, Fingerlings, and more. KERIAN MACHINES INC. 1709 Hwy 81 S PO Box 311 Grafton, ND 58237 Phone 701-352-0480 Fax 701-352-3776 Website: www.kerian.com Email: sales@kerian.com 158542KerMac13.indd 1 1/7/16 1:27 PM Max Yield From the Ground Up 1-800-288-8128 • www.tgschmeiser.com Better Soil Prep For a Higher Yield Max Yield From the Ground Up From the Ground Up 30' Till an' Bedder™ Seed Bed Maker Soil preparation equipment from TG Schmeiser is engineered to provide maximum productivity per acre. Versatile implements till, mulch, cultivate and firm the soil for optimum seed germination. C M Y CM MY CY CMY K 2016MaxYield4.6x4.6FINAL.pdf 1 11/24/15 1:59 PM 157791TGSchm13.indd 1 1/3/17 9:26 AM