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Effects of chemical thinning with Armothin® on fruit set, yield and quality of Japanese plum (Prunus salicina Lindl.) cv. ‘Fortune’

100%

Bennewitz von E., Cabalin A., Losak T.

Acta Scientiarum Polonorum. Hortorum Cultus

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2019

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tom 18

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nr 3

The effects of the application of the chemical thinner Armothin® on fruit set, yield and quality of Japanese plum (Prunus salicina Lindl.) cv. ‘Fortune’ were studied during two seasons in Central Chile (34.56°S, 71.5°W). Trees were sprayed with Armothin® at 0.5%, 1% and 2% concentrations. All thinning treatments reduced the fruit set and fruitlet number (fruitlets/50 cm of branch). Armothin® at 2% conc. was the most aggressive treatment, drastically reducing the fruit set from 85.9% and 82.9% of the control and crop load to unprofitable levels during both seasons. Chemical thinning treatments at the two lowest concentrations (0.5 and 1%) did not significantly alter the crop load compared with the unsprayed control during both study seasons. Thinning costs were reduced (Armothin® 0.5%, 25.0% and 21.5% of the control treatment and Armothin® 1%, 24.6% and 24.1% of the control, during the first and second season, respectively). In general, chemical thinning increased the fruit size and total soluble solids content (TSS). Taking into account the effects on thinning, crop load, fruit quality and thinning costs, Armothin® 1% and Armothin® 0.5% are the most advantageous treatments in the case of this study.

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Optimisation of thinning of apple fruitlets cv. 'Braeburn Mariri Red'

84%

Szot I., Lipa T.

Acta Agrophysica

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2019

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tom 26

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nr 3

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

67%

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 Acta Agrophysica

1 Acta Scientiarum Polonorum. Hortorum Cultus

2 Lipa T.

2 Szot I.

1 Baryla P.

1 Bennewitz von E.

1 Cabalin A.

1 Dobrzanski jr. B.

1 Kaplan M.

1 Losak T.

2 2019

1 2018

Effects of chemical thinning with Armothin® on fruit set, yield and quality of Japanese plum (Prunus salicina Lindl.) cv. ‘Fortune’

Optimisation of thinning of apple fruitlets cv. 'Braeburn Mariri Red'

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