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Thinning of flowers-fruitlets in organic apple production

100%

Stopar M.

Journal of Fruit and Ornamental Plant Research

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2004

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tom 12

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nr Spec.ed.

2

Flower and fruit thinning effects on the development and quality of 'Sampion' apple fruits

80%

Szot I.

Journal of Fruit and Ornamental Plant Research

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2010

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tom 18

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nr 2

129-138

The influence of flower or fruit hand-thinning methods on fruit quality was estimated in the experiment conducted from 1997 to 1999, at the commercial orchard near Lublin in Poland. The experiment was carried out on ' Sampion' trees/M.26 planted in a bed system at 1 x 2 x 4 m spacing. The study was a complete randomized block design with a single-tree plot replicated eight times. In 1999, during the vegetative period, the dynamics of fruitlet growth were also observed. Fruitlets on trees subjected to flower thinning towards the end of the flowering period, were characterized as having a fast rate of growth in all separated subperiods. However, the control fruits, despite having quite a fast rate of growth in the first separated subperiod, showed the slowest rate of growth in the following two subperiods. Flower thinning at the pink bud stage, and towards the end of flowering had a beneficial influence on yield of fruit > 70 mm in diameter and mean fruit mass. The control trees gave the smallest yield of fruit > 70 mm in diameter. The control fruits were characterized as having a lower mean fruit mass. Fruits from trees subjected to flower thinning at the pink bud stage had the biggest P and K content, but tended to have the smallest Ca content and the biggest K/Ca ratio. The control fruits had the great Ca content and tended to have the lowest K/Ca ratio.

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The influence of Floredux, MaxCel and Brevis on the yield of apple trees cv. Sampion

80%

Szot I., Lipa T., Dobrzanski jr. B., Kaplan M., Baryla P.

Acta Agrophysica

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2018

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tom 25

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nr 4

Flower or fruitlet thinning is one of the cultural practices used for improving the fruit quality and regulation of yield. The effect of ATS (FloreduX), 6-BA (MaxCel) and metamitron (Brevis) on yield and some fruit characteristics of apple trees cv. Šampion/ M.9 T337 was evaluated. Chemical thinning agents were applied alone, as subsequent spraying or as a tank mixture. Due to the possibility of damage to flowers by the announced frosts, a preparation containing sea algae – Goëmar was added in some treatments. Thinning with only MaxCel resulted in an excessive reduction of the total yield expressed in the number of fruits and their mass, but using MaxCel after flower thinning with Floredux gave very good results. The total yield expressed in kg tree-1 was even bigger than in the control, but the share of fruits with diameter above 7.5 mm was much better. The most promising method of thinning apple trees cv. ‘Szampion’ was the use of MaxCel+Brevis, at fruitlets diameter of 10-12 mm. The yield expressed by the number of apples on a tree was much smaller than in the control, but total yield did not differ from the total yield of the control trees. Apples in this treatment were characterised by the highest mass and length, as well as large diameters. In the fruits of this treatment, there was no significant reduction in flesh firmness relative to the control, and they had the highest dry matter content.

Ograniczanie wyników

2 Journal of Fruit and Ornamental Plant Research

1 Acta Agrophysica

2 Szot I.

1 Baryla P.

1 Dobrzanski jr. B.

1 Kaplan M.

1 Lipa T.

1 Stopar M.

1 2018

1 2010

1 2004

Thinning of flowers-fruitlets in organic apple production

Flower and fruit thinning effects on the development and quality of 'Sampion' apple fruits

The influence of Floredux, MaxCel and Brevis on the yield of apple trees cv. Sampion