ISHS Acta Horticulturae 110: V International Symposium on Virus diseases of Ornamental Plants
FURTHER OBSERVATIONS ON LILAC RINGSPOT, A DISEASE CAUSED BY AN UNIDENTIFIED VIRUS |
| Author: | F.A. van der Meer |
| Abstract:
From the majority of lilacs with rings and line patterns in the Netherlands none of nine sap-transmissible viruses known from lilac, could be isolated in repeated attempts. The lilac ringspot syndrome is therefore believed to be caused by an unknown and hitherto not sap-transmitted virus. Symptoms of lilac ringspot show much variation in size and shape of rings and lines and their severity varies much between cultivars and through the years. Lilac ringspot and six sap-transmissible viruses were not common and virus-free material of most cultivars could easily be obtained. This material is now being distributed by the Netherlands Inspection Service for Arboriculture (NAK-B). Of two old cultivars clean material was obtained by heat treatment at 37°C during five to eight weeks. | |
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