ISHS Acta Horticulturae 367: VI International Symposium on Pear Growing
PEAR ROOTSTOCK RESEARCH IN BRITISH COLUMBIA |
| Authors: | F. Kappel, H. Quamme, M. Meheriuk, L. Denby |
| Keywords: | Pyrus communis, trunk cross-sectional area, yield efficiency, interstems, accumulated yields, blossoming |
| Abstract:
Pear rootstock evaluation work has been conducted for several years at the Summerland Research Station. At present a number of different trials are underway to evaluate rootstocks and interstems for pears. A trial was established to compare a number of Old Home x Farmingdale (OHxF) selections to Bartlett seedling and two Quince rootstocks. Yields were highest for trees on OHxF 87, 515, 34, and 69. The most vigorous rootstocks were OHxF 515 and 34, followed by OHxF 87 and 69. Yield efficiencies were highest for OHxF 87, Quince C, OHxF 69, and Quince A. Another trial was planted to compare a number of pear cultivars propagated on Ottawa 3, a winter hardy apple rootstock. After two seasons growth, some indications of incompatibility are being exhibited (eg. stunted growth) with some cultivars performing better than others. In another trial, a number of potential size-controlling rootstocks are being used as interstems. These include: B14, B22, B27, BD-1, BD-2, and OHxF 69. The interstems B22, B27, and BD-1 suffered winter injury in the nursery. The roots and crowns of Quince rootstocks can suffer from winter injury, limiting their usefulness. A trial was initiated to assess means to protect the rootstock against winter injury. Presently we have not suffered a test winter at Summerland but we have some interesting information on the effect of the various treatments on the early growth of the trees. | |
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