Use of root pruning, paclobutrazol, and prohexadione-Ca combination strategies to control growth and improve productivity on pear trees
Growth control in pear orchards is essential, not just to reduce competition between vegetative and reproductive sinks, but also to improve return bloom, yield and fruit quality. The goal to optimize growth control, return bloom and yield must be pursued with the integration or combination of several strategies. Aim of this study was to assess the use of root pruning, paclobutrazol, and prohexadione-Ca (ProCa) either alone or in combination, to control growth and improve productivity on pear trees. The experiment was conducted during three years in a 10 year-old pear orchard with ‘Blanquilla’ as the scion cultivar. All of the different strategies that were assessed improved growth control in pear trees, with different grade depending on the strategy. Control trees had about 50% of the shoots shorter than 60 cm, root pruning 63%, ProCa 70%, paclobutrazol and root pruning plus ProCa 83%, and root pruning plus paclobutrazol 86%. In addition, yield, fruit weight and return bloom were more affected by applications of ProCa than paclobutrazol. Use of paclobutrazol either alone or in combination with root pruning seems to be most suitable for situations of high-vigor cultivars. The fact that use of paclobutrazol may be challenged again in the future, leave combinations of root pruning plus ProCa as the best shot for vigorous cultivars. In other situations of medium-low vigor, ProCa alone would be the best strategy.
633 - Cultius i produccions
Instituto Nacional de Investigación y Tecnología Agraria y Alimentaria
Is part of
Spanish Journal of Agricultural Research
Lordan, Jaume, Pere Vilardell, Estanis Torres, Simó Alegre, and Luis Asín. 2019. "Use Of Root Pruning, Paclobutrazol, And Prohexadione-Ca Combination Strategies To Control Growth And Improve Productivity On Pear Trees". Spanish Journal Of Agricultural Research 17 (2): e0902. Instituto Nacional de Investigacion y Tecnologia Agraria y Alimentaria (INIA). doi:10.5424/sjar/2019172-14579.
Grant agreement number
INIA/Programa Nacional de Recursos y Tecnologías Agroalimentarias/RTA03-030-C2-2/ES/Mejora de la viabilidad de las plantaciones de peral en les zonas productoras de Aragón y Cataluña, mediante la reducción de vigor y la obtención de pera Conference de calidad/
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