 | EDITORS' PREFACE (R.H. Lawson, M.K. Corbett) |
| RECENT ADVANCES IN VIRUS DETECTION AND IDENTIFICATION BY BIOASSAY AND SEROLOGICAL TESTS (M. Hollings) |
| DETECTION OF CARNATION VIRUSES WITH THE TEST PLANT SAPONARIA VACCARIA 'PINK BEAUTY' (F.A. Hakkaart) |
| IDENTIFICATION OF A COMPONENT OF THE CARNATION STREAK DISEASE: THE "YELLOW AND NECROTIC BLOTCH" REACTION (M. Verhoyen) |
| DETECTION OF A NEW INFECTIOUS DISEASE OF ROSES IN CALIFORNIA (D.J. Gumpf, L.G. Weathers) |
| TREATMENTS THAT IMPROVE MECHANICAL TRANSMISSION OF CHRYSANTHEMUM CHLOROTIC MOTTLE VIRUS (R.K. Horst, C.M. Geissinger, M. Staszewicz) |
| CUCUMBER MOSAIC VIRUS IN NANDINA AND OTHER ORNAMENTALS (O.W. Barnett, L.W. Baxter Jr) |
| VECTORS AND VARIATIONS (W.F. Rochow) |
| CONTROL OF THE SPREAD OF THE BROWN RING FORMATION VIRUS DISEASE IN THE LILY MID-CENTURY HYBRID 'ENCHANTMENT' BY MINERAL-OIL SPRAYS (C.J. Asjes) |
| RECENT ADVANCES IN VIRUS PURIFICATION (R.W. Fulton) |
| RESEARCH ON PELARGONIUM VIRUSES IN SPAIN - I. PRELIMINARY WORK ON VIRUS IDENTIFICATION: HOST RANGE, SEROLOGY, ELECTRON MICROSCOPY AND TISSUE CULTURE (A. Pena Iglesias, P. Ayuso, M. Rubio Huertos, R. Moreno) |
| SOME PROPERTIES OF TWO SPHERICAL VIRUSES ISOLATED FROM GERANIUMS IN BRITAIN (O.M. Stone) |
| CHRYSANTHEMUM STUNT: A VIROID DISEASE (T.O. Diener, R.H. Lawson) |
| FURTHER INVESTIGATIONS ON THE IDENTIFICATION OF THE VIRUS OF CHRYSANTHEMUMS IN BELGIUM (M. Verhoyen) |
| DETECTION OF VIRUSES AND DIAGNOSIS OF PLANT VIRAL DISEASES BY ELECTRON MICROSCOPY (M.K. Corbett) |
| A PASSION MOSAIC VIRUS FOUND IN SPAIN - I. SYMPTOMATOLOGY, HOST RANGE, TRANSMISSION AND ULTRASTRUCTURE OF DISEASED PLANTS (A. Pena Iglesias, P. Ayuso, M. Rubio Huertos, R. Moreno) |
| DISTRIBUTION AND STAINING PROPERTIES OF CYMBIDIUM MOSAIC VIRUS IN BUDS OF CATTLEYA ORCHIDS (R.H. Lawson, S.S. Hearon) |
| CELL AND ORGAN CULTURE METHODS IN VIRUS DISEASE THERAPY (T. Murashige, J. Barnhill Jones) |
| PRODUCTION OF HYACINTH MOSAIC VIRUS-FREE HYACINTHS AND LILY SYMPTOMLESS VIRUS-FREE LILIES BY MERISTEM TIP CULTURE (C.J. Asjes, M.H. Bunt, D.H.M. van Slogteren) |
| PARTIAL ELIMINATION OF VIRUS FROM DOUBLY INFECTED ORCHIDS BY MERISTEM EXPLANT CULTURE (M. Ishii) |
| PRODUCTION OF VIRUS-FREE LILIES (T.C. Allen) |
| TISSUE CULTURE AS A TOOL IN STUDIES OF HOST-VIRUS INTERACTIONS (H.H. Murakishi) |
| INTERACTION OF VIRUSES IN THE HOST (A.F. Ross) |
| VIRUSES IN BEGONIA TUBERHYBRIDA CV. MULTIFLORA (W. Welvaert) |
| PEROXIDASE ISOZYMES IN SOME VIRUS-INFECTED ORCHIDS (CH. Suchonlimakul, M. Ishii) |
| A VIRUS INHIBITOR IN PELARGONIUM SP. (W. Welvaert) |
| NEW APPROACHES TO THE DIAGNOSIS AND CONTROL OF PLANT YELLOWS DISEASES (R.E. Davis) |
| YELLOWS DISEASE OF GLADIOLUS AND HYACINTH IN THE NETHERLANDS - 1) ADDITIONAL DATA ON FIELD CONTROL WITH SYSTEMIC INSECTICIDES AND EFFECTS OF TREATING CORMS AND BULBS IN HOT WATER - 2) DETECTION OF MYCOPLASMA-LIKE BODIES IN THE PHLOEM OF DISEASED HYACINTH LEAVES (D.H.M. van Slogteren, N.P.A. Groen, P.J. Muller) |
| INTERNATIONAL COOPERATION IN VIRUS RESEARCH ON ORNAMENTAL PLANTS (H. Ronde Kristensen) |
