Influence of Gibberellic Acid (GA ) on Fruit Quality of Sweet Cherries ...

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Use Pattern Timing: • Late stage II, pit hardening (translucent green to straw colour) • Use sufficient water volume to ensure thorough wetting Concentration • 42 – 126 ppm <strong>GA</strong> 3 (16-48 grams ai/acre) • [$61 - $183/acre; 100 gallons/acre] Other Effects/Precautions • Avoid overdosing lower canopy • Avoid unusually warm/cold days • Less effective on early ripening cultivars • Excessive concentrations can reduce return bloom Orchard and Vineyard Show, Traverse City, MI – Jan 21-22, 2009 8
Benefits <strong>of</strong> <strong>GA</strong> on sweet cherries <strong>GA</strong> has been shown to: • Improve fruit firmness • Increase soluble solids • Increase fruit weight • delay fruit maturity by 3-5 days • Greener stems • Improved storage life • results on reducing rain-induced fruit cracking are contradictory [Drake et al, 1978, Facteau, 1989, Looney and Lidster, 1980, Proebsting et al, 1973] Orchard and Vineyard Show, Traverse City, MI – Jan 21-22, 2009 9
Page 1 and 2: Orchard and Vineyard Show, Traverse
Page 3 and 4: University of Guel
Page 5 and 6: PGR Responses Auxin Gibberrellin Cy
Page 7: unction Products Available Research
Page 11 and 12: Materials and Methods - 2004 Plant
Page 13 and 14: Fruit firmness (kg) 0.25 0.20 0.15
Page 15 and 16: Fruit Colour (1 st harvest) Fruit c
Page 17 and 18: 2003 Data Orchard and Vineyard Show
Page 19 and 20: Mean Fruit Weight (g) 10 9 8 7 6 5
Page 21 and 22: Table 1. Effect of
Page 23 and 24: ‘Hedelfingen’ fruits on July 11
Page 25 and 26: Further Information The MSU Fruit M
Page 27 and 28: http://www.plant.uoguelph.ca/treefr

Influence of Gibberellic Acid (GA ) on Fruit Quality of Sweet Cherries ...

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