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A ground colour ratio curve: a useful method for the evaluation of the cultivar specific characteristics of maturation for determining the harvesting dates of Japanese pears (Pyrus serotina var. culta)


, : A ground colour ratio curve: a useful method for the evaluation of the cultivar specific characteristics of maturation for determining the harvesting dates of Japanese pears (Pyrus serotina var. culta). Journal of the Japanese Society for Horticultural Science 49(1): 15-22

Variations in the degree of maturity of Japanese pear fruits on the tree, the maturation rate of individual fruits, the dropping tendency of mature fruit and harvesting dates may all be evaluated using a pattern of green to yellow colour changes in fruit (ground colour ratio curve) on the tree during the season. The technique for producing the curve and the method of estimating harvesting periods are described. The curve is specific.

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