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The relationship between impact and internal bruising in potato tubers

1985; Elsevier BV; Volume: 32; Issue: 2 Linguagem: Inglês

10.1016/0021-8634(85)90071-x

1095-9246

R. Noble,

Plant Disease Management Techniques

A pendulum impact tester was developed which was capable of measuring rebound angle and tuber deformation and recording an acceleration/time curve of an impact. Impact tests were conducted on two varieties of potato: Record, which is susceptible to blackspot bruising and King Edward, which is susceptible to internal crushing and shattering. The impact conditions were varied by altering the mass and drop angle of the pendulum. The dimensions and volume of each bruise following each impact were determined. The relationships between different impact measurements and bruise types were compared. Precise relationships between the impact a potato tuber receives and the occurrence of different types of internal bruising are defined. Impact duration was found to have a critical effect on the type of amount of resultant bruise. For the same energy absorption, impacts of relatively long duration resulted in more blackspot and internal crushing whereas impacts of relatively short duration resulted in more internal shattering.