THE PERFORMANCE OF PEAR ROOTSTOCKS IN THE NORTH EUROPEAN CLIMATIC CONDITIONS
Since 2001 Estonia participates in the Baltic fruit rootstock studies program. The aim of the trial is to find out the effect of new pear rootstocks on winter hardiness, tree growth, productivity and fruit size. The Latvian pear cultivar Suvenirs was grown on the Cydonia rootstocks Quince QA, Quince BA29, vegetatively propagated Pyrus rootstocks Pyrodwarf and OH×F 333, and the Pyrus seedling rootstocks Kirchensaller Mostbirne and Kazraushu. In Estonia, the pear trees were studied at the Polli Horticultural Research Centre of the Estonian University of Life Sciences (58°7N, 25°32E) on sod podzolic soil. Estonia is the northernmost country of the cooperation partners; in spite of that, the trees have not suffered any cold damage, before the unusually cold winter of 2009/2010. The trunk cross sectional area (TCA) ranged from 54.7-70.8 cm2 in the 10th year after planting. Only trees on rootstock OH×F333 were significantly smaller than trees on BA29. The highest cumulative yield during the ten years was on Quince QA and Quince BA 29 (116.2 and 104.8 kg per tree respectively). Significantly lower yields were obtained on Pyrus rootstocks Pyrodwarf and OH×F 333 (76.1 and 79.8 kg per tree respectively). The rootstocks had no significant effect on average fruit weight.
Haak, E., Tiirmaa, K. and Univer, N. (2013). THE PERFORMANCE OF PEAR ROOTSTOCKS IN THE NORTH EUROPEAN CLIMATIC CONDITIONS. Acta Hortic. 981, 401-404
Cydonia oblonga, Pyrus communis, quince, vegetative growth