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Methods of packing and handling sweetpotatoes are important for mitigating postharvest losses due to decay. The goal of this work is to take a critical look at the packing and handling processes in North Carolina (NC) sweetpotato packinghouses. Similar surveys are being conducted in Louisiana and Mississippi as part of a multi-state project. The survey is inclusive of all packingline operations including sequence of machinery components, length and speed of the packingline, decay control products/strategies used, and impact (bruising) measurements. Packingline impacts are quantified and characterized using a SmartSpud. This instrumented device is placed on the packingline where it is conveyed alongside sweetpotatoes, measuring the impact forces exerted and sending the data via a radio signal to a handheld personal digital assistant (PDA). The information on the PDA is downloaded onto a computer where the results can be displayed in more detail and analyzed. Packinghouse personnel respond well to this visual display and willingly spend one hour being interviewed, discussing the results of the survey, learning about the trouble spots on their lines, and getting advice on how to reduce potential injuries. About 15 out of 30 NC packinghouses have been surveyed (this includes all of the high-volume packinghouses). We typically found the largest impacts (30–70 G) occurring during dumping and at unprotected conveyor changes. Packinglines vary in length from 88 ft to 277 ft with run time varying from 3.5 min to &gt;10 min. Lines all share the same basic components (dump, eliminator, brushbeds, sizer, etc.) with layout and design modified to suit individual needs and space requirements. A variety of decay control methods are in use with about one half of packers surveyed routinely applying the fungicide Botran.

AN IN-DEPTH SURVEY OF SWEETPOTATO PACKING AND HANDLING PROCEDURES IN NORTH CAROLINA