אסיף מאגר המחקר החקלאי

Thidiazuron increases fruit size of 'Spadona' and 'Coscia' pear (Pyrus communis L.)

Year:

2003

Source of publication :

Authors :

Volume :

78

Co-Authors:

Stern, R.A., MIGAL, Galilee Technology Center, P. O. Box 90000, Rosh Pina 12100, Israel
Shargal, A., Department of Fruit Trees, Institute of Horticulture, Volcani Center, P. O. Box 6, Bet Dagan 50250, Israel
Flaishman, M.A., Department of Fruit Trees, Institute of Horticulture, Volcani Center, P. O. Box 6, Bet Dagan 50250, Israel

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Abstract:

The effect of the synthetic cytokinin thidiazuron (TDZ), derived from phenylurea, on fruit size of the small-fruited 'Spadona' and 'Coscia' pears was examined during five consecutive years (1998-2002) in Israel. TDZ applied at 2030 ppm, two weeks after full bloom, when the fruitlet diameter was 10 mm, caused an appreciable increase in fruit size of both cultivars. Although slight thinning accompanied the large increase in fruit size, the main TDZ effect was achieved through a direct enhancement of fruit cell division. TDZ increased fruit size without affecting fruit shape, seed number, or return yield in the year following application. Our findings demonstrate the effectiveness of TDZ for both pear cultivars and show that it has a significant potential for improve cropping, apparently without significant negative aspects.

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