ISHS Acta Horticulturae 386: XVI International Symposium on Fruit Tree Virus diseases
OVERWINTERING OF PEAR DECLINE AGENT IN SOME QUINCE ROOTSTOCKS |
| Authors: | C. Poggi Pollini, R. Bissani, L. Giunchedi |
| Abstract:
A study was carried out to determine the persistance during winter of the pear decline agent in phloem tissues of several quince rootstock selections grafted with different pear cultivars. The naturally infected trees had shown characteristic pear decline foliage symptoms for the first time the previous summer. Polymerase chain reaction revealed phytoplasmas in the roots of all 18 quince CTS 212 rootstocks of pear decline affected Williams trees examined, but only in six out of the 16 quince C rootstocks of Comice trees, in four out of 22 quince BA 29 rootstocks of Abate Fetel trees and in two out of 26 quince A rootstocks of Conference trees or Williams trees. From these results it can be concluded that there are a considerable variation in the suitability of quince selections for overwintering of the pear decline agent. | |
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