ISHS Acta Horticulturae 309: XV International Symposium on Fruit Tree Diseases
THE RATE AND WAY OF PRUNUS NECROTIC RINGSPOT VIRUS SPREAD IN SOUR CHERRY ORCHARD AND IN THE ROOTSTOCK PRODUCTION |
| Authors: | S. Kryczynski, M.S. Szyndel, A. Stawiszynska, W. Piskorek |
| Abstract:
The each year testing (1986–89) of 314 sour cherry trees cvs. Nefris and North Star has shown that PNRSV infection was increasing slowly during 4 consecutive years (7.3, 10.8, 11.5 and 19.1% of infected trees). The rate of the virus spread was highly dependent on the intensity of blooming and the newly infected trees were usually found in the neighbourhood of previously infected ones. These observations, together with the finding that sour cherry anthers were better source of PNRSV than leaves, suggested that pollen transmission is the most important way of the virus spread in the orchard. More than 1000 seeds of PNRSV-infected North Star trees were sown, and among 130 obtained seedlings 76.9% were virus-infected. | |
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