SOME PROPERTIES OF FOUR VIRUSES ISOLATED FROM CARNATION PLANTS

Abstract

Four viruses isolated from commercial carnation varieties were transmitted to Sweet William plants (Dianthus barbatus L.), which react characteristically with them. Two, carnation ring‐spot virus and carnation mottle virus, have spherical particles, the first about 19 nift and the second about 32 mμ in diameter. Both survive heating for 10 min. at 85 o but not at 90 ° C, and remain active at room temperature in sap from Sweet William for more than 2 weeks. They are not serologically related, and have not been transmitted by Myzus persicae.