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Arroyo F.T.,Ifapa Centro Las Torres Tomejil Apdo Oficial | Jimenez-Bocanegra J.A.,Ifapa Centro Las Torres Tomejil Apdo Oficial | Garcia-Galavis P.A.,Ifapa Centro Las Torres Tomejil Apdo Oficial | Santamaria C.,Ifapa Centro Las Torres Tomejil Apdo Oficial | And 4 more authors.
Spanish Journal of Agricultural Research | Year: 2013

The growth, phenology and fruit yield of 14 Japanese plum cultivars (Prunus salicina Lindl) were studied in two newly established experimental orchards under organic and conventional management. The experiment was conducted during 2005-2011 in the province of Seville (SW Spain), an important region of Japanese plum culture. Trunk crosssection areas (TCSA), flowering, yield and tree defoliation before winter dormancy were analysed over several years. After one year, TCSA were larger in the organically managed orchard (OMO) for most of the cultivars, in the next two years they were equal, and from the fourth year, several cultivars showed significantly larger TCSA in the conventionally managed orchard (CMO). Flowering in the conventional orchard started from 2 to 6 days before and lasted for 3 to 5 days more than in the OMO. Several cultivars produced significantly more fruit in the CMO, being the average fruit yield in the organic orchard about 72% of the conventionally managed orchard. Autumn defoliation was significantly advanced in the organic orchard, especially in cultivars highly susceptible to rust (Tranzschelia pruni spinosae), a disease not adequately controlled in the organic orchard. Source

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