Because the Lloyd George variety of raspberry appeared to be immune from infection by raspberry ringspot virus in grafting experiments (Cadman, in lit.), crops of Lloyd George have been examined rather carefully, primarily to see whether or not the variety is immune in field conditions. Although no plants infected with raspberry ringspot virus were found, a previously unknown disease was observed in two fields. A description of this disease, and the studies which led to the conclusion that it is associated with a strain of cucumber mosaic virus, is given below.