Articles
EFFECT OF THE SYNTHETIC AUXIN 3,5,6-TPA ON PRE-HARVEST DROP, FRUIT QUALITY AND MATURATION OF ‘DELICIOUS’ AND ‘JONATHAN’ APPLES
Article number
774_32
Pages
251 – 258
Language
English
Abstract
The main apple cultivar grown in Israel, Delicious, and a minor cultivar, Jonathan, are prone to massive pre-harvest drop.
Spraying both cultivars with the synthetic auxin 3,5,6-trichloro-2-pyridyl-oxyacetic acid (3,5,6-TPA) reduced pre-harvest fruit drop and increased yield.
Application of 40 mg L-1 3,5,6-TPA, two weeks before anticipated harvest (WBH) or 30 mg L-1 3,5,6-TPA at four and two WBH showed the best results, and were as effective as 2,4,5-TP, which was the commercial product commonly in use until withdrawn.
There were no negative effects on fruit quality at harvest or during 9 months storage.
Therefore, 3,5,6-TPA can be recom¬mended for routine use on Delicious and Jonathan apples.
Spraying both cultivars with the synthetic auxin 3,5,6-trichloro-2-pyridyl-oxyacetic acid (3,5,6-TPA) reduced pre-harvest fruit drop and increased yield.
Application of 40 mg L-1 3,5,6-TPA, two weeks before anticipated harvest (WBH) or 30 mg L-1 3,5,6-TPA at four and two WBH showed the best results, and were as effective as 2,4,5-TP, which was the commercial product commonly in use until withdrawn.
There were no negative effects on fruit quality at harvest or during 9 months storage.
Therefore, 3,5,6-TPA can be recom¬mended for routine use on Delicious and Jonathan apples.
Authors
R.A. Stern, R. Ben-Arie
Keywords
apple, Malus domestica, synthetic auxin, fruit drop
Online Articles (61)