A mosaic disease was observed orr lettuce in Cameron Highlands, Malaysia. The virus was readily sap-transmitted to Chenupodium amaranticolor, Gomphrena globosa, Lactuca sativa and Lathyrus odoratus. The following plants: Brassicae junceae Cassia, occidentalis, Nicotiana glutinosa, N. rustica, N. tabacum, and Plantago major were not susceptible to the virus. Systemics symptoms were produced on C. amaranticolor,L . sativa, and L.odorata. Local lcsions sere produced on leaves of G. globosa. Myzus persicae (Sulz.) readily transmitted the virus in a non-persistent manner. From host range,symptomatology and aphid transmission studies, the disease was found to be caused by lettuce mosaic virus.

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