Achieving both increasing size and ripening uniformity of "Dollcy" olives by Safe treatments without Leaf Abscission . [electronic resource]

Includes bibliographic reference

This study was conducted on ten-year-old "Dolley" olive trees at EL-Nubaria region, Beheira governorate, Egypt to achieve both increasing size and ripening uniformity of Dolley olives without leaf abscission by using GA] treatment near the end of stage I of fruit growth and spraying Ethrel at 350 ppm and lisophos at 400 ppm 2-3 weeks before normal harvest. The results proved that GA] at 100 ppm caused a significant increase in fruit weight, size, flesh weight, fruit length, fruit diameter, TSS and chlorophyll a, b as compared with the control. Meanwhile, they decreased carotene and anthocyanin content. On the other hand, Ethrel-treated fruits did not show a significant change in fruit size, weight, fruit length and fruit diameter. Furthermore, it decreased TSS, fruit acidity and chlorophyll a, b. Moreover, it increased carotene and anthocyanin content. Lisophos-treated Dolley olive fruit did not cause a significant change in fruit size, weight and diameter. The incorporation of lisophos with Ethrel in one formulation reduced the percentage of leaf abscission as compared with Ethrel alone. Thus, the use ofGA] at 100 ppm followed by the formulation containing Ethrel at 350 ppm plus Iisophos at 400 ppm was optimum for achieving both increasing size and ripening unifonnity of Dolley olives while reduced leaf abscission percentage.

Summary in Arabic