Articles
FRUIT THINNING AGENTS FOR APPLE CULTIVAR ‘FUJI’: COMPARISON AMONG FORMULATES
Article number
998_3
Pages
37 – 42
Language
English
Abstract
Ammonium thiosulphate (ATS) (1%), 6-benzyladenine (BA) (100 ppm) and metamitron (100, 175, and 350 ppm) were evaluated as thinning agents on 3 years old Fuji/M9 apples trees.
The formulates were applied in a single and double application or as a combination.
No differences between treatments as far as yield, fruit weight and number of fruits (70-85 mm) were detected although the fruit commercial size classes were affected.
The fruit set was reduced by all the treatments, and Metamitron at 350 ppm caused over-thinning in trees with low crop load.
Weather conditions affect ATS+BA efficacy.
Hand thinning (performed at one fruit/cluster spaced 15 cm apart one from each other) is effective but an alternative must be found because the manual operation is very costly.
The formulates were applied in a single and double application or as a combination.
No differences between treatments as far as yield, fruit weight and number of fruits (70-85 mm) were detected although the fruit commercial size classes were affected.
The fruit set was reduced by all the treatments, and Metamitron at 350 ppm caused over-thinning in trees with low crop load.
Weather conditions affect ATS+BA efficacy.
Hand thinning (performed at one fruit/cluster spaced 15 cm apart one from each other) is effective but an alternative must be found because the manual operation is very costly.
Publication
Authors
C. Fernandes, C.M. Oliveira, M. Mota
Keywords
ammonium thiosulphate, 6-benzyladenine, crop load, Malus domestica, metamitron
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