ISHS Acta Horticulturae 386: XVI International Symposium on Fruit Tree Virus diseases
A STEM PITTING OF APRICOT |
| Authors: | B. Di Terlizzi, V. Savino |
| Abstract:
The disorder described in this paper was observed in two apricot orchards of cv. Tirynthos grafted onto myrobalan with cv. Stanley as intermediate stock, in the southmost part of Apulia (Salento peninsula). Affected plants (50 out of 880) had a bushy vegetation with small leaves that turned chlorotic in summer. The fruits were fewer but larger than normal and tasteless. The bark of the trunk and main branches showed extensive splitting, was spongy and much thicker than that of healthy trees. Upon removal of the cortex, the woody cylinder of the scion, but not of the roostock, exhibited a clear-cut pitting. There was no appreciable difference in the relative diameter of scion and rootstock. All symptomatic plants were infected by Prunus necrotic ringspot ilarvirus (PNRSV) as ascertained by mechanical transmission to herbaceous hosts and ELISA. Graft transmission trials to woody indicators are under way. | |
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