• store room with apple




  • Spinach Fluorescence photo

     



  • HarvestWatch system with labels


  • FIRM Sample chamber kennel

  • Sample system layout


  • HarvestWatch FIRM sensors in a commercial DCA store room


  •  
    DCA controls superficial scald




  • Dynamic Controlled Atmosphere (DCA) storage of fruit with HarvestWatch technology provides the marketplace with high quality fruit without the use of chemicals
  • Chlorophyll, a pigment found in all higher plants, is a fluorophore. This image of spinach chlorophyll dissolved in solution shows how chlorophyll fluoresces red
  • The HarvestWatch™ system is a specialised fluorometer developed by Dr. Robert Prange and colleagues (AAFC and Satlantic Inc., Nova Scotia, Canada) and distributed by Isolcell Italia S.p.A. It uses fluorescence (Fα) to let storage operators know when their fruit are stressed
  • FIRM sample chamber (kennel)
  • A typical HarvestWatch system with multiple hubs and sensors
  • Six chlorophyll fluorescence (HarvestWatch) FIRM kennels in a commercial apple DCA store room
  • DCA using the HarvestWatch system controls superficial scald in apples and pears
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Category: Papers
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pdf.png Prange, R.K., J.M. DeLong and P.A. Harrison. 2005. Quality management through respiration control: Is there a relationship between lowest acceptable respiration, chlorophyll fluorescence and cytoplasmic acidosis? Acta Hort. 682:823-830. HOT

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2012-08-02 19:02:21
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pdf.png DeLong, J.M., R.K. Prange, J.C. Leyte and P.A. Harrison. 2004. A new technology that determines low-oxygen thresholds in controlled-atmosphere-stored aples. HortTechnology 14:262-266. HOT

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2012-08-02 19:56:45
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pdf.png DeLong, J.M., R.K. Prange and P.A. Harrison. 2007. Chlorophyll fluorescence-based low-O2 CA storage of organic 'Cortland' and 'Delicious' apples. Acta Hort. 737:31-37. HOT

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2012-08-08 22:38:00
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pdf.png Gasser, F., T. Eppler, W. Naunheim, S. Gabioud and A. Bozzi Nising. 2010. Dynamic CA storage of apples: Monitoring of the critical oxygen concentration and adjustment of optimum conditions during oxygen reduction. Acta Hort. 876:39-46. HOT

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2012-08-18 23:34:23
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pdf.png Lafer, G. 2011. Effect of different storage conditions on storability and fruit quality of organically grown 'Uta' pears. Act Hort. 909:757-760. HOT

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2012-08-09 16:28:40
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pdf.png Prange, R.K., J.M. DeLong, PA. Harrison, J.C. Leyte and S.D. McLean. 2002. Oxygen concentration affects chlorophyll fluorescence in chlorophyll-containing fruit and vegetables. J. Amer. Soc. Hort. Sci. 128:603-607. HOT

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2012-08-02 19:12:57
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pdf.png Koepke, D. 2009. Einfluss der Sauerstoff-Konzentration im Lager auf den Schalenfleckenbefall bei 'Elstar'. Mitteilungen des Obstbauversuchsringes des Altes Landes 64:303-309. HOT

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2012-08-08 22:45:59
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pdf.png Prange, R.K., J.M. DeLong and A. H. Wright. 2010. Chlorophyll Fluorescence: Applications in postharvest horticulture. Chronica Hort. 50 (1):13-16. HOT

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2012-08-02 19:19:33
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pdf.png Prange, R.K., J.M. DeLong, B.J. Daniels-Lake and P.A. Harrision. 2005. Innovation in controlled atmosphere technology. Stewart Postharvest Rev. 1:3. Paper No. 9. 7 Dec. 2005. HOT

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2012-08-09 20:55:19
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pdf.png Prange, R.K., J.M. DeLong, J.C. Leyte and P.A. Harrison. 2002. Oxygen concentration affects chloophyll fluorescence in chlorophyll-containing fruit. Postharvest Biol. Technol. 24:201-205. HOT

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References

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System Overview

This new technology was developed and patented in Canada in 2001 by a research team led by Dr. Robert Prange and Dr. John DeLong.  Further research evaluation was conducted internationally, especially by Dr. Angelo Zanella of the Agricultural Research Institute Laimburg Italy which led to commercialisation in the U.S.A and Italy in 2003-2004.

The technology detects stress, e.g., low oxygen, by continuously monitoring changes in the chlorophyll fluorescence of the stored product. The major application of HarvestWatch technology is in dynamic controlled atmosphere-chlorophyll fluorescence (DCA-CF) storage of fruits and vegetables.

By the end of 2015, close to 1/2 million tonnes of apples and pears were being stored in >1680 DCA-CF rooms in >15 countries worldwide.