Blueberries
Blueberry Spray Programme
Number of Flower Clusters on 12 plants
Southern Highbush
Paarl
Application dates:
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Early harvesting (2016)
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Harvest (2016)
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Vegetative growth (2017)
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Early flowering (2017)
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Flowering (2017)
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Early harvest (2017)
Fruit Set & Retention
Southern Highbush
Paarl
Yield (t/ha)
Southern Highbush
Paarl
The C4L treatment resulted in an 11.17% improvement in yield compared to the untreated control (UTC).
Berry Mass (g)
Mass of 10 berries for different diameters
Harvested on 14 August 2017
C4L increased berry weight across various size categories for fruit of the same size.
°Brix values:
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UTC: 13.0
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C4L: 14.12
Berry Size Distribution
Average percentage berries per diameter (mm)
Taken on four different harvest dates
C4L enhanced berry size distribution, reducing the number of smaller berries and increasing larger-sized berries.
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Marketable Yield (t/ha)
Northern Highbush
California - 2024
7 Replicates
Randomised block design
The C4L programme achieved a 10.4% increase in marketable yield compared to the untreated control (UTC).
C4L was applied at 175 mL/ha:
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4 applications at 3-4 week intervals
Marketable Yield
Increase ($)
Paragroup Farms, Visalia California - 2024
The increase in marketable yield achieved with the C4L programme, resulted in an additional $30,290 per ha in revenue.