Abstract
Field trials investigating the impact of the timing of first shoot topping in a vertical shoot positioning (VSP) trellis system on (i) the cluster morphology, (ii) the canopy structure in the cluster-zone, and (iii) the progress of the bunch rot disease severity, were conducted in two white Vitis vinifera (Pinot gris, Riesling) cultivars in the years 2012 and 2013 in Luxembourg. The first shoot topping was carried out at seven different times from one week prior to beginning of flowering (BBCH 57) to four weeks after the end of flowering (BBCH 75–79) at approximately weekly intervals. Late first shoot topping reduced cluster compactness, delayed bunch rot epidemics, and thereby prolonged the potential ripening period compared to the standard treatment, in which the first shoot topping was performed one week postbloom. First shoot topping four weeks postbloom delayed the moment when 5% disease severity was reached up to eleven days and increased total soluble solids by 0.77 to 2.24 Brix compared to the standard treatment, with no significant impact on yield. Postponing the first shoot topping to the latest technically possible moment is recommended to improve grape architecture and health as well as to optimize grape maturity and potential wine quality under cool climate conditions. Late first shoot topping can be implemented in bunch rot control strategies without imposing additional costs and might support the reduction of pesticide use.
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Claims 8
Claim · model-written summary
Late first shoot topping reduced grape cluster compactness.
- Taxon
- Vitis vinifera
Vitis viniferae1 - Treatment
- Late first shoot toppinge0
- Outcome
- cluster compactnesse0
- Direction
- reducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Vitis vinifera (Pinot gris, Riesling)”
e0“Late first shoot topping reduced cluster compactness”
Claim · model-written summary
Late first shoot topping delayed bunch rot epidemics.
- Taxon
- Vitis viniferaVitis viniferae1
- Treatment
- Late first shoot toppinge0
- Outcome
- bunch rot epidemicse0
- Direction
- delayede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Vitis vinifera (Pinot gris, Riesling)”
e0“Late first shoot topping reduced cluster compactness, delayed bunch rot epidemics”
Claim · model-written summary
Late first shoot topping prolonged the potential ripening period versus standard topping.
- Taxon
- Vitis viniferaVitis viniferae1
- Treatment
- Late first shoot toppinge2
- Outcome
- potential ripening periode0
- Direction
- prolongede0
- Comparator
- standard treatmente0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Vitis vinifera (Pinot gris, Riesling)”
e0“thereby prolonged the potential ripening period compared to the standard treatment, in which the first shoot topping was performed one week postbloom”
e2“Late first shoot topping reduced cluster compactness”
Claim · model-written summary
Topping four weeks postbloom delayed reaching 5% bunch rot severity by up to eleven days.
- Taxon
- Vitis viniferaVitis viniferae1
- Treatment
- First shoot topping four weeks postbloome0
- Outcome
- moment when 5% disease severity was reachede0
- Direction
- delayede0
- Value
- up to eleven dayse0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Vitis vinifera (Pinot gris, Riesling)”
e0“First shoot topping four weeks postbloom delayed the moment when 5% disease severity was reached up to eleven days”
Claim · model-written summary
Topping four weeks postbloom increased total soluble solids by 0.77 to 2.24 Brix versus standard topping.
- Taxon
- Vitis viniferaVitis viniferae1
- Treatment
- First shoot topping four weeks postbloome0
- Outcome
- total soluble solidse0
- Direction
- increasede0
- Value
- 0.77 to 2.24 Brixe0
- Comparator
- standard treatmente0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Vitis vinifera (Pinot gris, Riesling)”
e0“First shoot topping four weeks postbloom delayed the moment when 5% disease severity was reached up to eleven days and increased total soluble solids by 0.77 to 2.24 Brix compared to the standard treatment”
Claim · model-written summary
Topping four weeks postbloom had no significant effect on yield.
- Taxon
- Vitis viniferaVitis viniferae1
- Treatment
- First shoot topping four weeks postbloome0
- Outcome
- yielde0
- Direction
- no significant impacte0
- Comparator
- standard treatmente0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Vitis vinifera (Pinot gris, Riesling)”
e0“First shoot topping four weeks postbloom delayed the moment when 5% disease severity was reached up to eleven days and increased total soluble solids by 0.77 to 2.24 Brix compared to the standard treatment, with no significant impact on yield”
Claim · model-written summary
The authors recommend topping as late as technically possible to improve grape architecture, health and maturity in cool climates.
- Taxon
- Vitis viniferaVitis viniferae1
- Treatment
- Postponing the first shoot topping to the latest technically possible momente0
- Outcome
- improve grape architecture and health as well as to optimize grape maturity and potential wine qualitye0
- Qualifier
- under cool climate conditionse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Vitis vinifera (Pinot gris, Riesling)”
e0“Postponing the first shoot topping to the latest technically possible moment is recommended to improve grape architecture and health as well as to optimize grape maturity and potential wine quality under cool climate conditions”
Claim · model-written summary
Late topping can enter bunch rot control strategies without extra costs and may reduce pesticide use.
- Taxon
- Vitis viniferaVitis viniferae1
- Treatment
- Late first shoot toppinge0
- Outcome
- bunch rot control strategies without imposing additional costs and might support the reduction of pesticide usee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Vitis vinifera (Pinot gris, Riesling)”
e0“Late first shoot topping can be implemented in bunch rot control strategies without imposing additional costs and might support the reduction of pesticide use”
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