EVALUATION OF QUINCE AND SELECTED 'FAROLD®' PEAR ROOTSTOCKS FOR COMMERCIAL 'WILLIAMS B.C.' PRODUCTION IN URUGUAY
Williams B.C. pear was grafted on two pear rootstocks: Farold®40 and Farold®69, and on three clonal quince rootstocks: BA 29, Adams and EMC with and without Beurré Hardy as an interstem. To evaluate the performance of these combinations in the south of Uruguay, grafted trees were planted in 2003 at INIA Las Brujas, Wilson Ferreira Aldunate Experimental Station (34°40 S-56°20 W). Rows were 4.5 m apart and variable distance was used between plants according to rootstock: 1.70 m (BA29, Farold®40 and Farold®69), 1.50 m (Adams), and 1.30 m (EMC). Observations on phenological, vegetative, and productive behavior of the Williams B.C. scions were carried out each year. From 2004 onwards, trunk cross-sectional areas (TCSA) showed differences allowing rootstocks to be ranked in order of decreasing vigor: > Farold®69 > Farold®40 > BA 29 > Adams > EMC. In 2014, trunk cross-sectional area on Farold®69 was 198.7 cm2/sup> while a minimum of 53.8 cm2 was measured on EMC. Different rate of plant death occurred, having higher losses among EMC and Adams with interstem and all quince rootstocks without interstem. Cumulative fruit yields per plant of nine harvests ranged between 149.8 (BA29 with interstem) and 73.5 kg tree-1 (EMC). The best performances were recorded on BA29 with interstem, Farold®40 and Farold®69 pear rootstocks, with an average of cumulative production of 190 ton ha-1. The highest yield efficiency was obtained with Farold®40 rootstock (0.35 kg cm-2 TCSA) and with BA29 with interstem (0.30 kg cm-2 TCSA). Therefore, to achieve maximum pear production potential under Uruguayan conditions, rootstock quince BA29 with Beurré Hardy as an interstem, Farold®40, and Farold®69 are the better options.
Cabrera, D., Rodríguez, P. and Zoppolo, R. (2015). EVALUATION OF QUINCE AND SELECTED 'FAROLD®' PEAR ROOTSTOCKS FOR COMMERCIAL 'WILLIAMS B.C.' PRODUCTION IN URUGUAY. Acta Hortic. 1094, 159-162
Pyrus spp., yield, interstem, incompatibility