Recommended Chestnut Storage and Handling Protocols

Stephen Morris

(based on  Sydney Postharvest Laboratory (SPL) research and other research and industry experience)

Chestnut

Harvesting and Handling

 Postharvest Dipping

Other postharvest disease control measures that have been reported as effective, but not tested on Australian chestnuts are

During the dipping process remove any floating chestnuts, as these may have rots or be immature2, 4, 10.

 Slight Water Loss before Storage

When freshly harvested, chestnuts contain a slightly higher water content than optimal for long-term storage, therefore some drying out of nuts before storage is widely recommended1, 9, 10, 11,16, 19, 22. 

These two measures should result in the loss of a few % moisture content (about 1-4% of total weight) and will greatly assist with final quality of stored chestnuts

 Storage

CALM Module V7

CALM in Coolroom


Providing the above protocols are followed, then storage of premium quality chestnuts with virtually no external rots, extremely little weight loss and no sprouting for 10 months or longer is possible. 

(It should be noted that while high carbon dioxide storage atmospheres will give significant control of internal rots (such as Phomopsis), control is not as effective as for external moulds)

If you have any queries please email spl@postharvest.com.au or ring +6194908443 or +61410603170


References

1.     
Chestnutz, 2006  Chestnutz - guideines for handling and storage of chestnuts,  New Zealand Chestnut Council, http://www.nzcc.org.nz/storage.html

2.      Badgersest, 2005  Badgersett.com: Storing & handling fresh Chestnuts, http://www.badgersett.com/info/chestnuts/instructions.html
3.      Stebbins, R.L. 1990. Requirements for a United States chestnut industry. p. 324-327. In: J. Janick and J.E. Simon (eds.), Advances in new crops. Timber Press, Portland, OR
4.      Pennsylvania State, College of Agricultural Science, 2006, Pollinating and Harvesting/Storage, http://chestnut.cas.psu.edu/Procedures/pollination/pollinating.htm
5.      Empire Chestnut Company, 2005 Preparation and storage of fresh chestnuts and dried chestnuts, http://www.empirechestnut.com/prep.htm
6.      Girolami Farms Chestnuts, 2006, Information about Chestnuts, http://www.chestnutsforsale.com/information_chestnut.htm
7.      Wahl, T. 2002 The Chestnut Grower’s Primer, Published by Southeast Iowa Nut Growers, http://www.farmprofitability.org/research/chestnut/chestnut.htm
8.      Rieger, M. 2005 Chestnuts - Castanea spp. Harvest, postharvest handling, http://www.uga.edu/fruit/chestnut.htm#harvest
9.      Kader, A.A. 2002, Produce Facts Chestnuts - Recommendations for Maintaining Postharvest Quality, http://postharvest.ucdavis.edu/Produce/ProduceFacts/Fruit/chestnuts.pdf
10.  Mencarelli, F.  2001, Postharvest handling and storage of chestnuts, TCP/CPR/8925 "Integrated Pest Management and Storage of Chestnuts in XinXian County, Henan Province, China, http://www.fao.org/documents/show_cdr.asp?url_file=/DOCREP/006/AC645E/ac645e02.htm
11.  Harte, J.B., et al. 2002, Effect of postharvest storage on the quality of Chinese chestnuts, Paper 100C-38, 2002 Annual Meeting and Food Expo - Anaheim, California
12.  Estévez, A.M., et al. 2005 ´Marron Glacé´ quality affected by storage conditions of the nut , Proc. IIIrd Intl. Chestnut Congress, Eds.: C.G. Abreu, E. Rosa & A.A. Monteiro, Acta Hort. 693, ISHS 2005
13.  Higgins, N. C.,  2006, Growing Chestnuts, Michigan Nut Growers Association, http://www.oldhouseweb.com/gardening/garden/03900044.shtml
14.  Morris, S.C. 2006, CH02003 - Development of chestnut bin scale controlled atmosphere system (CALM), Horticulture Australia Limited, Sydney
15.  Mignani, I., Vercesi, A. 2003, Effects of postharvest treatments and storage conditions on chestnut quality. Acta Horticulturae (No.600) : 781-785
16.  Jermini, M. et al.  2006  Influence of fruit treatments on perishability during cold storage of sweet chestnuts. J. Science  Food and Agric. 86 (6) : 877-885
17.  Conedera, M. et al.  2005  Harvesting, treatment and storage of chestnuts. Sherwood - Foreste ed Alberi Oggi (No.108) : 17-23
18.  Panagou, E. Z. et al. 2005, Efficacy of hot water, hypochlorite, organic acids and natamycin in the control of post-harvest fungal infection of chestnuts. J. Hort. Science and Biotech. 80 (1) : 61-64
19.  Chen JianMing et al. 2003 Study on the cold storage of chestnut. South China Fruits 32 (5) : 44-45
20.  Rouves, M.; Prunet, J. P. 2002 for chestnut storage: controlled atmosphere and its effects. Infos-Ctifl (No.186) : 33-35
21.  Wu Jian et al. 2002 Effects of oxygen and carbon dioxide on the freshness quality of chestnuts stored at low temperature. J. Fruit Sci. 19 (4) : 252-255
22.  Institute of Forestry, Hunan, China  1983 Trials on fresh-keeping storage of chestnuts under room temperature. Science and Technology (Linye Keji Tongxun) (No. 9) : 18-22
23.  Snare, L. 1997 Chestnuts. In “The New Rural Industries - A handbook for Farmers and Investors.” Rural Industries Research & Development Corporation, http://www.rirdc.gov.au/pub/handbook/chestnuts.html 



 
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