Search results for "Prunus persica L."

Non-destructive determination of ‘Big Bang’ nectarine quality and harvest maturity

2021

In nectarines, potential shelf life and quality at consumption are closely related to the ripeness stage of fruit at harvest. Usually, the harvest is based on color, firmness, sugar and acids content of fruit, although these determinations are carried out through destructive methods and in a limited number of samples. The technique of Vis/Nir spectroscopy is used for the development of a non-destructive index based on the difference of absorbance (IDA) between two wavelengths near the absorption peak of chlorophyll-a, and it allows monitoring of changes in ripeness processes directly in the field. The objective of this paper is to track changes in quality that occur during nectarine ripenes…

Diurnal irrigation timing affects fruit growth in late-ripening nectarines

2021

Little is known about the best diurnal irrigation timing for maximum fruit growth in stone fruit, despite fruit size being the most important focus for growers to achieve maximum marketable yield. This study investigated the effects of morning and afternoon irrigation on nectarine fruit growth in stage I (cell division) and stage III (cell expansion). In the 2017/18 season, ‘September Bright’ trees were subjected to morning (Iam) and afternoon (Ipm) irrigations. Fruit diameter was monitored continuously (15-min intervals) using fruit gauges and converted into fruit weight, relative growth rate (RGR) and fruit growth efficiency (FGE), with the latter representing RGR per unit of crop water s…

ADATTAMENTO ALLA GESTIONE BIOLOGICA DI CULTIVAR DI PESCO ( PRUNUS PERSICA L. BATSCH ) SICILIANE OTTENUTE ATTRAVERSO SELEZIONE MASSALE E INCROCIO.

2011

The effect of two growth bio regulators on the physiological, phenological and qualitative parameters of peach tree production

2021

The risk that plants have not accumulated sufficient chilling units (CU) and the economic interest in anticipating flowering have led to growing scientific interest in the use of bio plant regulators to stop dormant peach trees in farms that use agronomic particulates in precision farming protocols. The trials were conducted in 2016 and 2017, on peach trees of the cultivar Maycrest, grown in a commercial orchard located in Metaponto, Basilicata (Southern Italy). A complete randomization experimental scheme was adopted; three theses (control, Fast and Regular® and Asy 23) and two different intervention periods have been provided for, the doses used have been 500g/hl for Fast & Regular® a…

Canopy Architecture Appraisal by Fractal Dimension of 'Flordastar' Peach Trees Grafted onto Different Rootstocks

2007

The objective of this research was to evaluate the modification of canopy architecture of ''Flordastar'' peach (Prunus persica L. Batsch) grafted onto rootstocks with different vigour, by the use of fractal dimension (D). The hypothesis was that different vigour rootstocks are able to modify the complexity of the branching pattern and that this effect can be assessed by a geometric parameter such as the fractal dimension (D) of the 2D projection of tree branching structure. The observations were carried out in a four-year-old experimental orchard of cv. ''Flordastar'' peach trees grafted onto Ishtara, Barrier, GF677 and MrS 2/5 rootstocks. On digital pictures of leafless, dormant peach tree…

Instrumental and sensory evaluation of eating quality of peaches and nectarines

2012

The influence of flesh firmness on consumer acceptance and its relationship with total soluble solids (TSS), titratable acidity (TTA) and sensory analysis were studied for fruits of ‘September Sun’ and ‘Sweet September’ (low acid) peach (Prunus persica (L.) Batsch), and ‘Maria Dolce’ (low acid) and ‘Venus’ nectarine (Prunus persica (L.) Batsch, var. nucipersica) cultivars. Sensory descriptors, assessed by a short-trained panel, were firmness, sweetness, sourness, aroma, acceptability. Different stages of fruit firmness did not always result in significant differences of TSS, TTA and their ratio, but the panel was able to discriminate fruit ripening stages, in terms of fruit firmness, aroma …