บทคัดย่องานวิจัย

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Maturity indices to predict optimum harvest date for the storage of Conference pears in Switzerland.

Hohn, E.; Datwyler, D.; Gasser, F.;

COST 94. The postharvest treatment of fruit and vegetables. Determination and prediction of optimum harvest date of apples and pears. Proceedings of a meeting, Lofthus, Norway, 9-10 June 1994. Year: 1996 Pages: 149-156 Ref: 4 ref.

1996

บทคัดย่อ

Maturity indices to predict optimum harvest date for the storage of Conference pears in Switzerland.

The maturity index proposed by Streif (firmness/(refractometer value x starch pattern)) was evaluated in terms of its reliability for the determination of the optimal harvest date (OHD) of Conference pears. Samples were taken from 2 orchards in 1990, 1991 and 1992. Pears were picked on 4 dates in each year and stored under controlled atmosphere (CA) conditions for up to 7 months. At each harvest date the maturity index was determined and related to the OHD. The criteria used for determination of OHD included fruit firmness and eating quality after storage, as well as incidence of cavities. Conference pears destined for long term storage had to be picked before the maturity index decreased to 0.54. Taking into account that harvesting of an orchard may take 1-2 weeks, picking should begin when the maturity index approaches values of 1.1 to 0.8. The results of this initial study warrant further work to confirm the usefulness of the maturity index using pears from other sites and regions.