FIELD TEST RESULTS WITH MECHANICAL CITRUS FRUIT REMOVAL DEVICES

WHITNEY, JODIE D.

Abstract


The field performances of four machines were evaluated for mechanical removal of oranges from the tree during the 1995-96 season. After 5 to 20 sec of shaking per tree, Compton trunk shakers removed 67 to 98% of the fruit and Orchard and Grove Machinery trunk shakers removed 63 to 96% of the fruit. Trunk diameters ranged from 5 to 11 inches. Fruit removal was directly related to shaker head displacements which varied from 1 to 2 inches. A canopy shaker with 2 nylonspoked drums oscillating at 3.5 inches displacements removed 70 to 90% of the fruit in the canopy volume penetrated by the spokes and 52 to 70% between the outer canopy and the trunkline or tree center. Fruit removal generally decreased with increasing ground speed from 1 to 2 mph. The fourth unit was the Crunkelton machine which had a rectangular array of 7 ft long tubes with spring loaded fingers which were inserted and withdrawn from the tree canopy. Within the canopy volume penetrated by the tubes, 67 to 77% of the fruit was removed after 1 insertion and 73 to 91% was removed after 2 insertions.

Keywords


shakers; mechanical harvesting

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Proc. Fla. State Hort. Soc.     ISSN 0886-7283