Effect of organic treatments with calcium carbonate and bio-activator on quality of ‘Reinette’ apple cultivars |
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Authors: | M. Guerra V. Marcelo J.B. Valenciano P.A. Casquero |
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Affiliation: | 1. Department of Agrarian Engineering and Sciences, University of León, Av. Astorga s/n, 24400 Ponferrada, León, Spain;2. Department of Agrarian Engineering and Sciences, University of León, Av. Portugal, 41, 24071 León, Spain |
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Abstract: | ‘Reinette du Canada’ (RC) and ‘Reinette Grise du Canada’ (RG) apple (Malus × domestica Borkh) cultivars declared throughout the Community as Protected Designation of Origin ‘Manzana Reineta del Bierzo’ are severely affected by bitter-pit during storage. Pre-harvest treatments with calcium carbonate, authorized in organic production, and bio-activator Harpin protein were used to assess the effect on quality at harvest and during cold storage in both apple cultivars during 2007 and 2008. Bitter-pit at the end of storage was higher in ‘RC’ than in ‘RG’, due to the fact that K/Ca ratio in fruit was higher in ‘RC’. Harpin protein did not improve the quality of ‘Reinette’ apple cultivars. Calcium carbonate pre-harvest treatments were useful to decrease external and internal bitter-pit incidence of ‘Reinette’ apple cultivars after 90 days of storage, but differences at the end of storage were not significant. Therefore, calcium carbonate would be a useful product in organic production in order to decrease bitter-pit incidence in ‘Reinette’ apple cultivars during medium term storage. |
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Keywords: | Cold storage Bitter-pit Harpin protein Malus × domestica Organic production &lsquo Reinette du Canada&rsquo |
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