Abstract
In this study, the effect of phosphonic acid (2-chloroethyl) on the physical and chemical characteristics of Red globe and Trakya ilkeren table grapes were determined. The experiment was completely randomized block desing with 10 treatment combinations replicated in three blocks. Ethephon (active ingredient of Ethrel®, containing 480 mg L-1 ethephon) of four dosages and a control (0 control, 150, 300, 450, 600 mg L-1) were applied at a spray volume of 1000 (L ha-1) to bunches using a backpack pressure sprayer with hand to ensure thorough wetting and applications times (T1-T4). The application times (T) may be described as follows :T1-beginning of berry colour; T2-20 to 25 % berry colour; T2-40 to 50 % berry colour and T4-80 to 90 % berry colour. It was found that various ethephon application times and dosages generally had statistically no significant effects on physical characteristics (berry weight, berry length, berry width) and sugar fractions (fructose, β-glucose, α-glucose, sorbitol, galactose) in all grape varieties. However, chemical characteristics were observed a decrease titratable acidity and an increase total soluble solids and the amount of color pigments (total anthocyanins). As results of the study, general recommendations are made of 300 (mg L-1) ethephon for Red globe and Trakya ilkeren table grapes, both applied at 20 to 25 % berry colour (T2).
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Claims 6
Claim · model-written summary
Ethephon application times and dosages had no statistically significant effect on grape berry physical traits.
- Taxon
- table grapest0
- Treatment
- ethephon application times and dosagese0
- Outcome
- berry weight, berry length, berry widthe0
- Direction
- no significant effectse0
Not reportedComparator
Verbatim
t0“table grapes (Vitis vinifera L.)”
e0“various ethephon application times and dosages generally had statistically no significant effects on physical characteristics (berry weight, berry length, berry width)”
Claim · model-written summary
Ethephon application times and dosages had no statistically significant effect on grape sugar fractions.
- Taxon
- table grapest0
- Treatment
- ethephon application times and dosagese0
- Outcome
- sugar fractions (fructose, β-glucose, α-glucose, sorbitol, galactose)e0
- Direction
- no significant effectse0
Not reportedComparator
Verbatim
t0“table grapes (Vitis vinifera L.)”
e0“various ethephon application times and dosages generally had statistically no significant effects on physical characteristics (berry weight, berry length, berry width) and sugar fractions (fructose, β-glucose, α-glucose, sorbitol, galactose)”
Claim · model-written summary
Ethephon applications decreased grape titratable acidity.
Not reportedComparator
Verbatim
t0“table grapes (Vitis vinifera L.)”
e0“chemical characteristics were observed a decrease titratable acidity and an increase total soluble solids and the amount of color pigments (total anthocyanins)”
e1“Ethephon (active ingredient of Ethrel®, containing 480 mg L-1 ethephon)”
Claim · model-written summary
Ethephon applications increased grape total soluble solids.
Not reportedComparator
Verbatim
t0“table grapes (Vitis vinifera L.)”
e0“Ethephon (active ingredient of Ethrel®, containing 480 mg L-1 ethephon)”
e1“an increase total soluble solids and the amount of color pigments (total anthocyanins)”
Claim · model-written summary
Ethephon applications increased total anthocyanins in grapes.
Not reportedComparator
Verbatim
t0“table grapes (Vitis vinifera L.)”
e0“Ethephon (active ingredient of Ethrel®, containing 480 mg L-1 ethephon)”
e1“an increase total soluble solids and the amount of color pigments (total anthocyanins)”
Claim · model-written summary
The authors recommend 300 mg L-1 ethephon at 20 to 25% berry colour for both grape varieties.
Verbatim
e0“general recommendations are made of 300 (mg L-1) ethephon for Red globe and Trakya ilkeren table grapes, both applied at 20 to 25 % berry colour (T2)”
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