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Background – Why thin?

Crop Thinning Cost Effective Methods to Improve Wine Quality James Freckleton The Yalumba Wine Company. Background – Why thin?. 2004 Vintage Heavy crops Quality problems – late ripening Resource issues-unable to secure labour Opportunity to trial new methods. Financial Comparison.

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Background – Why thin?

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  1. Crop ThinningCost Effective Methods to Improve Wine QualityJames FreckletonThe Yalumba Wine Company

  2. Background – Why thin? 2004 Vintage Heavy crops Quality problems – late ripening Resource issues-unable to secure labour Opportunity to trial new methods

  3. Financial Comparison

  4. Shoot Thinning

  5. Advantages Quality Canopy Balance Yield Reduction Cost Disadvantages Spur Position/ Damage Frost/ Poor Set Considerations End target Timing (early/ late) Weather Shoot thinning

  6. Thinning to early can lead to re-shooting

  7. Late

  8. Cost? Early thinning cost ($300 - $1,000 per ha) Late thinning cost ($1,000 - $1,300 per ha) Shoot thinning

  9. Actual cost of shoot thinning?

  10. Mechanical Thinning

  11. The Vineyard J Trial H A

  12. It would be nice if Ashley gave us a hand Can’t wait until the baby comes – no more of these bloody trials. Boy this is hard work!!

  13. Implementation – What Did We Do?Machine Set-Up 2 bow rods on either side Highest bow rod set approx 5 - 10cm below the cordon wire Remove buckets and fish plates Set a constant tractor speed of 2.1km/hr

  14. Results

  15. First Attempt!

  16. Control (not thinned) 26.9 T / Ha

  17. After The Harvester! Pea size berry

  18. Treatment - 440rpm (16ºC) 11t / ha Reduction 6.6% Shoot Damage

  19. Treatment - 480rpm (16ºC) 19.4t / Ha Reduction 9% Shoot Damage

  20. Treatment - 440rpm (25ºC) 11.5t/ Ha Reduction 3.7% Shoot Damage

  21. Treatment - 480rpm (25ºC) Change Slide 7.4 t / Ha Reduction 3.3% Shoot Damage 7.4 t / Ha Reduction 3.3% Shoot Damage

  22. Treatment - 520rpm (16ºC) 15.5 T / Ha Reduction 15% Shoot Damage

  23. Can You See A Difference? Control 440 rpm 520 rpm 480 rpm

  24. Shoot Damage

  25. Yield Loss Vs Time This graph indicates that actual % crop-loss at harvest is double that immediately following thinning. This is a result of desiccation of damaged bunches over time.

  26. Baume Vs Yield

  27. Maturity – Thinned Vs Un-thinned

  28. Current Practices Trial a row first Weather Conditions- warmer is better Timing-pea size Zone of fruit- target one area and hit hard Machine set-up Harvester Properties Beater speeds Beater location (mindful of Trellis system?) Machine speed Variety

  29. Machine Thinning Experiences with Other Varieties and Different Harvester Set-ups

  30. Sauvignon Blanc

  31. Shiraz

  32. Take Home Messages Final fruit destination Consider as cost effective options Timing of processes Weather Conditions

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