Physiological aspects of post harvest berry drop in certain grape varieties
DOI:
https://doi.org/10.5073/vitis.1959.2.34-39Abstract
Storage experiments were conduced with fruit of two grape varieties, Muscat of Hambourg and Dabouki.- The drop of Muscat of Hambourg is a "dry drop" while the Dabouki has no definite drop. Shed berries in this latter variety were due mostly to mechanical injury.
- The dry drop due to an abscission layer was found to be a "physiological drop".
This drop could be:- Prevented by subjecting the fruit to cold store immediately after picking.
- Reduced by spraying the fruit 4 days before picking with 10-20 ppm of NAA or PCPA if storage has to be postponed for more than 36 hours.
- Growth regulators as well as delayed cold storage had no effect on the drop of Dabouki berries during storage.
- A mechanism for the shedding in varieties with a physiological drop was suggested.
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