Table Grapes
Table grape spray programme
Effect of C4L on nutrient content of fruit
Colour enhancement
Autumn Royal
Wellingnton - 2018
A 15% increase in bunches achieving the prima colour grade was observed with C4L in the standard programme
Application detail:
1st App: 5 Jan 2018 (80% Bunch colouring)
2nd App: 12 Jan 2018 (7 DAA-1)
Evaluation: 8 Feb 2018 (27 DAA-2)
Water volume:~1400 L/ha
Colour enhancement
Crimson seedless
Riebeek-kasteel - 2021
6 Replicates, Randomised block design
19% more bunches reached the top two colour categories when C4L was added to the standard programme
Application detail:
1st App: 21 Jan 2021 (50 - 60% Colour development)
2nd App: 26 Jan (5 DAA-1)
Evaluation: 8 Feb 2021 (13 DAA-2)
Water volume: ~100 L/ha
Berry size
Crimson seedless
Wellington - 2019
4 Replicates, Randomised block design
Evaluation: 7 Feb 2019 (10 DAA-4)
Bunch quality: Stem browning
Crimson seedless
Wellington - 2019
4 Replicates, Randomised block design
Evaluation: 15 Feb 2019 (7 days post harvest)
The C4L programme significantly reduced stem browning, enhancing the shelf life of the bunches
Grapes were stored between 18 - 19°C
5 berries, 8 bunches = 40 berries per treatment
Fruit quality: Berry firmness
Crimson seedless
Wellington - 2019
4 Replicates, Randomised block design
Evaluation: 15 Feb 2019 (7 days post harvest)
The C4L programme significantly improved berry firmness, enhancing the quality and the shelf life of the bunches
Grapes were stored between 18 - 19.5°C
Berry weight and size
Starlight
Paarl - 2023
Semi-commercial trial
Evaluation: 19 Dec 2023
The full C4L programme resulted in a 15.1% increase in berry weight and a 4.5% increase in berry size
Colour enhancement
Starlight
Paarl - 2023
Semi-commercial trial
Evaluation: 19 Dec 2023
14% more bunches reached the two colour categories when C4L was added to the standard programme
Bunch quality: Berry firmness and stem browning
Starlight
Paarl - 2023
Semi-commercial trial
Evaluation: 7 Feb 2024
Cold storage: 2°C for 5 weeks
The full C4L programme significantly improved berry firmness and reduced stem browning, enhancing the shelf life of bunches
Berry weight
Autumn Crisp
Hex river - 2024
Semi-commercial trial
A 12% increase in berry weight was observed when C4L was incorporated into the standard programme
C4L was applied 3 times at 500 mL/ha:
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24 Nov 2023
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19 Dec 2023
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16 Jan 2024
Fruit finish: Thrips damage
Autumn crisp
Hex river - 2024
Semi-commercial trial
Thrips damage was observed in only 5% of C4L-treated bunches, compared to 46% in the untreated control.
Evaluation method:
Evaluation done from sizing pictures taken by Aerobotics at 3 different locations per block. (Pictures taken at week 5 & 7. Total pictures per treatment: 65)
Bunches with Thrip damage was placed into 1 of 2 two severity groups: Slight or Moderate-severe
C4L was applied 3 times at 500 mL/ha:
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24 Nov 2023
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19 Dec 2023
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16 Jan 2024