ISHS Acta Horticulturae 494: II International Symposium on Chestnut
SWEET CHESTNUT INCOMPATIBILITY AND MOSAICS CAUSED BY THE CHESTNUT MOSAIC VIRUS (CHMV) |
| Author: | J.C. Desvignes |
| Keywords: | chestnut, incompatibility, mosaic, virus |
| DOI: | 10.17660/ActaHortic.1999.494.68 |
| Abstract:
Sweet chestnut viral mosaic is caused by an unpurified, unidentified pathogen called chestnut mosaic virus (ChMV) as it presents most characteristics of plant viruses. On the chestnut tree, the virus causes necrotic lesions in the bark and wood which turn into cankers, or incompatibilities when two cvs of different sensitivity are assembled through grafting. It also induces chlorotic lesions on leaf veins expressed by yellow stripes and partial limb atrophy. The sensitivity or tolerance of a hundred cvs was examined. Results varied according to the species. Half of the Castanea crenata cvs were sensitive, half were slightly sensitive. Approximately 1/7 of C. sativa cvs were slightly sensitive (e.g.: Belle Epine, Campanese, Olargues), and the others tolerant. Among the C. crenata x C. sativa hybrids, ¼ were noted as sensitive (e.g.: Maraval, Marigoule), ¼ slightly sensitive (e.g.: Bouche de Bétizac, Bournette), and ½ tolerant. Oak trees can also replicate the ChMV. Approximately 15% of the Quercus pedunculata and 20% of the Q. rubra appeared to be sensitive and showed necrosis and mosaics. On the other hand, Q. pubescens and Q. ilex appeared as tolerant. The ChMV is epidemic on the chestnut. It was transmitted experimentally by the aphid Myzocallis castanicola. | |
Download Adobe Acrobat Reader (free software to read PDF files) | |
