 | OPENING ADDRESS (P. Dr. G. Schuhmann) |
| INTERNATIONAL COOPERATION ON PLANT VIRUS RESEARCH WITH SPECIAL REGARD TO FRUIT TREE VIRUSES (H. Rønde Kristensen) |
| THE DETECTION OF PLANT VIRUSES BY ENZYME-LINKED IMMUNOSORBENT ASSAY (ELISA) (M.F. Clark, A.N. Adams, D.J. Barbara) |
| THE DETECTION OF PLUM POX AND OTHER VIRUSES IN WOODY PLANTS BY ENZYME-LINKED IMMUNOSORBENT ASSAY (ELISA) (M.F. Clark, A.N. Adams, J.M. Thresh, R. Casper) |
| THE PERFORMANCE OF EMLA APPLE TREES (A.I. Campbell, A.F. Posnette, R. Cropley) |
| INFLUENCE OF INCREASED NITROGEN SUPPLY ON MINERAL COMPOSITION AND GROWTH OF SOUR CHERRY TREES IN THE ACUTE AND IN THE CHRONIC COURSE OF STECKLENBERG DISEASE (G. Baumann, C. von Olfers) |
| BIOCHEMICAL CHANGES OF PLUMS CAUSED BY PLUM POX VIRUS (B. György) |
| THE NATIONAL AND INTERNATIONAL ROLES OF THE IR-2 VIRUS-FREE FRUIT TREE REPOSITORY (P.R. Fridlund) |
| ANATOMICAL STUDY OF PRUNUS MERISTEMATIC TIPS (J. Colin, M. Verhoyen) |
| MICROGRAFTS WITH MERISTEMATIC TISSUES, A POSSIBLE TECHNIQUE TO ELIMINATE VIRUSES FROM PRUNUS TREES (J. Colin, M. Verhoyen) |
| CHEMOTHERAPY OF SOME FRUIT TREE VIRUSES (N. Minoiu) |
| INVESTIGATIONS TO DEMONSTRATE MYCOPLASMALIKE ORGANISMS IN DISEASED PLANTS BY FLUORESCENCE MICROSCOPY (E. Seemüller) |
| REACTION OF APPLE CULTIVARS TO INFECTION BY APPLE PROLIFERATION DISEASE (B. J. Zawadzka) |
| SPREAD OF APPLE PROLIFERATION IN A NEWLY ESTABLISHED APPLES PLANTATION (L. Kunze) |
| EPIDEMIOLOGICAL STUDIES ON FRUIT TREE MYCOPLASMA DISEASES IN THE EASTERN REGION OF SPAIN (J.A. Sánchez-Capuchino, G. Llácer, R. Casanova, J.B. Forner, R. Bono) |
| LEAFHOPPER FAUNA OF APRICOT ORCHARDS IN SOUTHERN FRANCE : OBSERVATIONS ON THE BIOLOGY OF A PRESUMED VECTOR OF CHLOROTIC LEAFROLL, FIEBERIELLA FLORII STÅL ; TRANSMISSION TRIALS (J. Bonfils, F. Lauriaut, F. Leclant) |
| TETRACYCLINE TREATMENTS OF STONE FRUIT TREES AFFECTED BY APRICOT CHLOROTIC LEAF ROLL (G. Llácer, J.A. Sánchez-Capuchino, J.B. Forner, R. Bono, R. Casanova) |
| STUDIES ON THE PHYSICAL AND CHEMICAL CONTROL OF APPLE PROLIFERATION IN TREE NURSERIES AND BEARING ORCHARDS (E. Gheorghiu) |
| SITUATION OF SHARKA DISEASE ON SOME EXPERIMENTAL PLUM ORCHARDS AFTER TWENTY YEARS OF THE INVESTIGATION (M.M. Jordovic) |
| EXPERIMENTS ON THE TRANSMISSIBILITY OF SHARKA VIRUS BY APHIDS (H. Krozal, L. Kunze) |
| TRANSMISSIBILITY OF SOME SHARKA VIRUS STRAINS BY MYZUS PERSICAE SULZ., DEPENDING ON VARIOUS INFECTION SOURCES (D. Šutic, M. Babovic, S. Markovic) |
| CONTRIBUTION TO THE STUDY OF SHARKA TRANSMISSION BY MYZUS PERSICAE SULZ (G. Massonié, P. Maison, K. Mazy) |
| SOME PROPERTIES OF PLUM POX VIRUS AND ITS NUCLEIC ACID AND PROTEIN COMPONENTS (C. Kerlan, J. Dunez) |
| SOME PROPERTIES OF CHERRY RASP LEAF VIRUS (R. Stace-Smith, A.J. Hansen) |
| A COMPARISON BETWEEN THE CAUSAL AGENTS OF CHERRY RASP LEAF AND FLAT APPLE DISEASES (C.L. Parish) |
| ASSOCIATION OF TOMATO RINGSPOT VIRUS WITH APPLE UNION NECROSIS AND DECLINE (R.F. Stouffer, J.K. Uyemoto) |
| INVESTIGATIONS ON PEAR STONY PIT VIRUS (H. Kegler, H. Kleinhempel, T.D. Verderevskaja) |
| IDENTIFICATION AND COMPARISON OF DIFFERENT STRAINS OF APPLE CHLOROTIC LEAF SPOT VIRUS AND POSSIBILITIES OF CROSS PROTECTION (C. Marenaud, J. Dunez, R. Bernhard) |
| COMPARISON OF TWELVE PRUNUS STRAINS AND ISOLATES OF THE ILARVIRUS GROUP (C. Marenaud, M. Lansac, F. Boukoursi) |
| ISOLATION OF A NEW RING SPOT VIRUS FROM PRUNUS SPECIES (M. Németh) |
| EMBRYOLOGICAL STUDIES OF ILAR-VIRUS INFECTED CHERRY SEEDS (J. Vértesy) |
| POSSIBLE RELATIONSHIP BETWEEN THE CAUSAL AGENT OF DAPPLE APPLE AND SCAR SKIN (A. Yamaguch, H. Yanase) |
| TRANSMISSION EXPERIMENTS ON THE VIRUS DISEASE DAPPLE APPLE (L. Giunchedi) |
| EXPERIMENTS WITH DAPPLE APPLE VIRUS (A.I. Campbell, T.R. Sparks) |
| STUDIES ON INTERRELATIONS BETWEEN STEM PITTING PATHOGENS FROM APPLE, PEAR, CHERRY, AND PEACH (T. Verderevskaja, T. Bivol, H. Kegler) |
| PEAR NECROTIC SPOT, A NEW VIRUS DISEASE IN JAPAN (K. Kishi, K. Takanashi, K. Abiko) |
| THE RE-INDEXING OF EMLA SCIONWOOD TREES AND ROOTSTOCKS GROWING ON SPECIAL STOCK NURSERIES (A.F. Posnette, A.I. Campbell, R. Cropley) |
| INDEXING FOR APPLE PROLIFERATION IN ROOTSTOCKS (P. Burmeister) |
| COMPARATIVE STUDIES OF GREEN CRINKLE IN 'GULDBORG' AND SOME ORNAMENTAL MALUS (A. Thomsen) |
| OBSERVATIONS ON APPLE STEM GROOVING VIRUS (F.A. van der Meer) |
| EXPERIENCES WITH SEVERAL INDICATORS FOR THE PEAR VEIN YELLOW VIRUS AND A COMPARISON BETWEEN PEAR VEIN YELLOWS AND QUINCE SOOTY RING SPOT SYMPTOMS (W. van Katwijk) |
| THE VIRUS DISEASES DETECTED IN GREENHOUSE AND IN FIELD BY THE PEACH SEEDLING GF 305 INDICATOR (J.C. Desvignes) |
| MYROBALAN LATENT RINGSPOT, A BIPARTITE GENOME VIRUS AND A STRAIN OF TOMATO BLACK RING VIRUS (J. Dunez, R. Delbos) |
| THE POSSIBLE EPIDEMIOLOGICAL SIGNIFICANCE OF POLLEN AND SEED TRANSMISSION IN THE CHERRY LEAF ROLL VIRUS/BETULA SPP. COMPLEX (J.I. Cooper) |
| OCCURENCE OF TWO SAP-TRANSMISSIBLE VIRUSES IN WALNUTS (V. Savino, A. Quacquarelli, D. Gallitelli, P. Piazzolla, G.P. Marteli) |
| OCCURENCE OF TWO SAP-TRANSMISSIBLE VIRUSES IN WALNUTS (V. Savino, A. Quacquarelli, D. Gallitelli, P. Piazzolla, G.P. Marteli) |
| OCCURING OF SOWBANE MOSAIC VIRUS IN PLUM TREE (D. Sutic, N. Juretic) |
| SOME PROPERTIES OF MACLURA MOSAIC VIRUS A MEMBER OF THE POTYVIRUS GROUP (N. Pleše, Z. Štefanac) |
| THE MOST FREQUENT VIRUSES AMONG VARIOUS PLUM CULTIVARS IN YUGOSLAVIA (M. Rankovic) |
| FURTHER STUDIES ABOUT THE HOST RANGE OF SHARKA (PLUM POX) VIRUS (G. Hamdorf) |
| LOCALIZATION OF THE SHARKA VIRUS IN PEACH TREES IN REFERENCE TO SANITARY CHECKING (G. Morvan, C. Castelain) |
| INDEXING FOR FLAT LIMB AND LINE PATTERN (G. Schmid) |
| VIRUS SYMPTOMS OBSERVED IN 'VIRGINIA CRAB' APPLE TREES INOCULATED WITH 'VERDEDONCELLA' (R. Gella-Fananas) |
| VIRGINIA DECLINE AS LATENT INFECTION IN SWEDISH APPLE TREES (K. Rydén) |
| INCIDENCE OF SOME GRAFT-TRANSMISSIBLE DISEASES IN SOUTH AFRICAN POME FRUIT NURSERY MATERIAL (P.J. Meyer, D.J. Engelrecht) |
| DISTRIBUTION OF VIRUS-TESTED FRUIT TREE VARIETIES IN THE FRENCH-SPEAKING PART OF SWITZERLAND (F. Pelet) |
| RECENT DEVELOPMENT IN TECHNIQUES AND EQUIPMENT FOR HEAT THERAPHY OF VIRUS-INFECTED POME FRUIT (R. Ikin) |
| ORIENTAL PYRUS ROOTSTOCKS AS INDICATORS OF PEAR DECLINE (H.R. Cameron) |
| THE EFFECT OF DIFFERENT STRAINS OF APPLE PROLIFERATION ON THE GROWTH AND CROP OF INFECTED TREES (L. Kunze) |
| APPEARANCE OF A DISEASE ON JAPANESE PLUM VARIETIES IN GREECE RESSEMBLING THAT OF CHLOROTIC LEAF ROLL: TRANSMISSION OF THE DISEASE BY GRAFTING (G.D. Syrgianidis, A.Ch. Mainou, E.Ch. Mouchtouri) |
| DETECTION OF VIRUSES AND OTHER GRAFT-TRANSMISSIBLE VIRUS-LIKE DISEASES OF FRUIT TREES |
