Prediction of Optimum Harvest Date of Apples

Tomala, K.; Piestrzeniewicz, C.

doi:10.17660/actahortic.1998.466.28

Acta Hortic.

1998

DOI: 10.17660/actahortic.1998.466.28

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Prediction of Optimum Harvest Date of Apples

K. Tomala¹,

C. Piestrzeniewicz²

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“…The conversion of starch to sugar is one of the most important processes that indicate the ripening stage of apples (Jackson 2003;Watkins 2003). A close correlation was found between the rate of starch degradation and the ethylene production (Tomala, Piestrzeniewicz 1998). Starch hydrolysis begins at the end of the fruit development process, around 2-3 weeks before the start of ethylene production (Lau 1985).…”

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confidence: 99%

Grouping of 24 apple cultivars on the basis of starch degradation rate and their fruit pattern

Szalay¹,

Ordidge²,

Ficzek³

et al. 2013

Hort. Sci. (Prague)

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Szalay L., Ordidge M., Ficzek G., Hadley P., Tóth M., Battey N.H., 2013. Grouping of 24 apple cultivars on the basis of starch degradation rate and their fruit pattern. Hort. Sci. (Prague), 40: 93-101.The ripening processes of 24 apple cultivars were examined in the United Kingdom National Fruit Collection in 2010. Basically the starch content, and additionally ground colour, water-soluble solids content and flesh firmness were studied during ripening. The degradation of the starch content was evaluated using a 0-10 scale. A starch degradation value of 50% was taken to be the optimum harvest date, with harvest beginning at a value of 40% and finishing at 60%. Depending on the cultivar, this represented a harvest window of 9 to 21 days. Later ripening cultivars matured more slowly, leading to a longer harvesting period, with the exception of cv. Feuillemorte. Pronounced differences were observed among the cultivars on the basis of the starch degradation pattern, allowing them to be divided into four groups. Separate charts were elaborated for each group that are recommended for use in practice.

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mentioning

confidence: 99%

Grouping of 24 apple cultivars on the basis of starch degradation rate and their fruit pattern

Szalay¹,

Ordidge²,

Ficzek³

et al. 2013

Hort. Sci. (Prague)

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Influence of Mulching on Replantation Disease in Sour Cherry Orchard

Rutkowski

Łysiak

2023

Agriculture

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Increasingly, in orchards around the world that are planted one after another, disturbances are observed, and these issues with growth and development are called replantation disease. It is manifested mainly by poor tree growth after planting and poor ripening. One way to reduce replantation disease is to improve soil fertility after many years of fruit tree cultivation. The aim of the work was to evaluate the growth and yield of cherries after replantation and to compare this with a site where fruit trees had not grown before. The trees were planted at two sites: after the replantation of the cherry orchard (OR1) and in a site where fruit trees had not been cultivated before (OR2). Two combinations were used in each orchard: boiler without mulching (C), mulch—after planting mulching with a substrate after growing mushrooms (M). The trees at the site after replantation grew and bore less fruit than in the position where fruit trees had not grown before. The disease also affected some of the quality characteristics of the fruit. This resulted in an increase in fruit weight and a darker color (L*) and a higher value of hue fruit color. Mulching, which is often recommended in orchards planted after previous cultivation, did not provide the expected improvement. It did not significantly affect tree growth and yield. Only an effect on the content of components in the soil was observed, but it affected the condition of the trees. In addition, we analyzed how experimental combinations responded to climatic conditions by calculating the correlations between the SAT (sum of active temperatures) and the stages of tree development.

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Prediction of Optimum Harvest Date of Apples

Cited by 2 publications

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Grouping of 24 apple cultivars on the basis of starch degradation rate and their fruit pattern

Grouping of 24 apple cultivars on the basis of starch degradation rate and their fruit pattern

Influence of Mulching on Replantation Disease in Sour Cherry Orchard

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