חיפוש מתקדם
Journal of Horticultural Science

Experiments were conducted in Israel for five years to reduce severe pre-harvest fruit-drop of Gallia Beauty, Jonathan and Starking Delicious apples. Satisfactory responses to 2, 4, 5-TP sprays were obtained at 40–60 ppm when these were applied at the onset of increased drop, which usually occurred about three weeks before harvest. Although this treatment reduced fruit-drop considerably and was active from about three days to one month after application, drop was not entirely prevented. A combined treatment of NAA+2, 4, 5-TP did not usually increase efficiency. The highest 2, 4, 5-TP dose tested (60 ppm) somewhat accelerated fruit ripening on the tree and imparted deeper coloration to the fruit. Keeping quality and storage life of this fruit were not adversely affected, even with the combined NAA+2, 4, 5-TP treatment, which advanced maturation more noticeably than other treatments. The application of inhibitors together with the highest 2, 4, 5-TP concentration did not retard maturation noticeably and was unnecessary. It seems that a single treatment of 40 ppm 2, 4, 5-TP could be used commercially under the conditions described.

פותח על ידי קלירמאש פתרונות בע"מ -
הספר "אוצר וולקני"
אודות
תנאי שימוש
The effects of growth regulators for the prevention of pre-harvest drop on the keeping quality of stored apples in the subtropical zone
46
The effects of growth regulators for the prevention of pre-harvest drop on the keeping quality of stored apples in the subtropical zone

Experiments were conducted in Israel for five years to reduce severe pre-harvest fruit-drop of Gallia Beauty, Jonathan and Starking Delicious apples. Satisfactory responses to 2, 4, 5-TP sprays were obtained at 40–60 ppm when these were applied at the onset of increased drop, which usually occurred about three weeks before harvest. Although this treatment reduced fruit-drop considerably and was active from about three days to one month after application, drop was not entirely prevented. A combined treatment of NAA+2, 4, 5-TP did not usually increase efficiency. The highest 2, 4, 5-TP dose tested (60 ppm) somewhat accelerated fruit ripening on the tree and imparted deeper coloration to the fruit. Keeping quality and storage life of this fruit were not adversely affected, even with the combined NAA+2, 4, 5-TP treatment, which advanced maturation more noticeably than other treatments. The application of inhibitors together with the highest 2, 4, 5-TP concentration did not retard maturation noticeably and was unnecessary. It seems that a single treatment of 40 ppm 2, 4, 5-TP could be used commercially under the conditions described.

Scientific Publication
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