ISHS Acta Horticulturae 472: XVII International Symposium Virus and Virus-Like Diseases of Temperate Fruit Crops
GENERAL ASPECTS OF PEACH LATENT MOSAIC DISEASE |
| Author: | G. Llácer |
| Keywords: | symptoms, detection, cross protection, epidemiology, host range, viroid, peach mosaic |
| Abstract:
Observations on indexing of peach latent mosaic (PLM) diseased plants carried out in orchards on peach GF 305 seedlings showed as early as 1968 reproducible anomalies, of viral origin, that were not caused by known viruses. The name peach “latent” mosaic referred to the absence or rarity of leaf symptoms on infected trees. Use of the cross protection technique allowed the detection of PLM disease in 30 % of new peach cultivars imported by France from the U.S. Generally, commercial varieties are infected with latent strains and the disease spreads naturally in peach orchards. The pathogen associated with PLM has never been transmitted to herbaceous plants. A viroid (PLMVd) has been characterized, in Spain and the U.S., as the causal agent of PLM disease. Symptoms produced by severe strains of PLM appear similar to those described for peach mosaic, peach calico and peach blotch in the U.S. and peach yellow mosaic in Japan. | |
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