 | PREFACE (Dr. G. de Bakker) |
| SOME FACTS ABOUT THE POSITION OF THE DUTCH BULB INDUSTRY (W. van Soest) |
| BULBOUS PLANTS IN SCIENTIFIC RESEARCH; PAST, PRESENT AND FUTURE (P.K. Schenk) |
| BULBOUS PLANTS WILD IN SOUTH-WEST ASIA (P. Furse) |
| BULB GROWING IN THE NETHERLANDS (A.F.G. Slootweg) |
| TRANSLOCATION AND DISTRIBUTION OF ASSIMILATES IN FLOWERING FRITILLARIA IMPERIALIS (J. van Die, T. Tietema) |
| THE INTERACTION OF TEMPERATURE AND PHOTOPERIOD ON GROWTH AND FLOWERING OF LILIUM LONGIFLORUM THUNB. CV.'NELLIE WHITE' (H.F. Wilkins, E. Waters) |
| VEGETATIVE AND FLOWERING RESPONSES OF LILIUM LONGIFLORUM THUNB. CULTIVARS TO COLD AND LONG DAY TREATMENT AS RELATED TO BULB MATURITY (A.N. Roberts, F.W. Moeller) |
| THE EFFECTS OF WARM STORAGE ON THE GROWTH AND FLOWERING OF LILIUM LONGIFLORUM (THUNB.) 'ACE' (R.W. Langhans, T.C. Weiler) |
| INFLUENCE OF LIGHT ON FLOWER BUD ABSCISSION IN PLANTS OF THE LILY CULTIVAR 'ENCHANTMENT' (G.A. Kamerbeek, A.J.B. Durieux) |
| CHANGES OF ENDOGENOUS GROWTH SUBSTANCES IN EASTER LILY AS EFFECTED BY COOLING (Y. Tsukamoto) |
| ENDOGENOUS GIBBERELLIN LEVEL IN ORNITHOGALUM ARABICUM AND ITS RELATIONSHIP TO STORAGE TEMPERATURES OF BULBS AND TO FLOWER DEVELOPMENT (A.H. Halevy, J. Mor, J. Valershtein) |
| ASPECTS OF EXTRACTABLE GIBBERELLIN-LIKE SUBSTANCES FROM TULIPA GESNERIANA L. (A.A. De Hertogh, L. Aung, A.E. Einert, G.L. Staby) |
| THE INFLUENCE OF DAYLENGTH ON THE DATE OF FLOWERING, HEIGHT AND CORMSIZE OF GLADIOLUS (E. Alvares Vega) |
| EFFECTS OF STORAGE AND DATE OF PLANTING ON FLOWERING AND BULB GROWTH OF NERINE BOWDENII (W. Sytsema) |
| TEMPERATURE AND MOISTURE INFLUENCE ON FLOWERING OF EUCHARIS GRANDIFLORA (R.S. Lindstrom) |
| INFLUENCE OF HEAT-TREATMENT TEMPERATURES DURING STORAGE ON FLOWER FORMATION AND DEVELOPMENT OF 5°-TULIPS (A.F.G. Slootweg, P. Hoogeterp) |
| FLOWER QUALITY IN RELATION TO STORAGE TREATMENTS FOR EARLY FORCING OF NARCISSUS AND TULIP (E.D. Turquand) |
| POST-HARVEST DEVELOPMENT OF CUT TULIP FLOWERS1) (M. Benschop, A.A. DeHertogh) |
| INFLUENCE OF 8-HYDROXYQUINOLINE CITRATE AND SUCROSE ON CARBOHYDRATE CONTENT OF LEAVES AND FLORETS OF CUT GLADIOLUS SPIKES (F.J. Marousky) |
| THE MORPHOLOGY AND PHYSIOLOGY OF BULBOUS PLANTS PAST, PRESENT AND FUTURE (A.R. Rees) |
| SOME ASPECTS OF THE RELATIONSHIP BETWEEN THE BIOLOGICAL AND THE ECONOMIC YIELD OF TULIP BULBS (M.J.G. Timmer) |
| STUDIES ON NUCLEAR PROTEINS OF TULIP: NUCLEAR ISOLATION AND PROTEIN FRACTIONATION (W.F. Sheridan) |
| THE BIOSYNTHESIS OF TERPENES IN CELL-FREE EXTRACTS FROM BULBS AS RELATED TO GROWTH AND DEVELOPMENT* (G.L. Staby, A.A. De Hertogh) |
| THE ALTERATION OF BULB HORMONES CONTENT BY ENVIRONMENTAL STIMULI (L.H. Aung) |
| SOME METABOLIC FACTORS ASSOCIATED WITH DORMANCY IN TULIPS (D.M. Shaw, E.W. Toop) |
| GUMMOSIS OF TULIP BULBS CAUSED BY ETHYLENE (G.A. Kamerbeek, A.L. Verlind, J.A. Schipper) |
| METABOLISM OF THE CARBOHYDRATE-PROTEIN CONTENT IN GLADIOLUS (A. Gromov) |
| CONTROL OF FUSARIUM AND PENICILLIUM ROTS OF IRIS, TULIP AND NARCISSUS WITH THIABENDAZOLE AND BENOMYL 1) (Ch.J. Gould, V.L. Miller) |
| CONTROL OF FUSARIUM IN SOME BULBOUS AND TUBEROUS PLANTS GROWN FOR CUTFLOWER PRODUCTION UNDER GLASS (G. Scholten) |
| NEW DEVELOPMENTS IN CONTROLLING BOTRYTIS TULIPAE IN TULIPS (A. W. Doornik, M. de Rooy) |
| CONTROL METHODS FOR POST-HARVEST DISEASES OF FLOWERS AND BULBS (R.O. Magie) |
| THE INTERACTION OF TEMPERATURE AND FUNGICIDES DURING THE STORAGE OF TULIP BULBS (E. Valásková) |
| HEAT THERAPY FOR CONTROL OF PYTHIUM STORAGE ROT OF BEGONIA TUBERS (R.D. Raabe, K.F. Baker) |
| OBSERVATIONS ON SCLEROTINIA (BOTRYTIS) NARCISSICOLA GREG., THE CAUSE OF NARCISSUS SMOULDER IN NORTHERN SCOTLAND (E. G. Gray) |
| A POSSIBLE EXPLANATION OF VARIATIONS IN SUSCEPTIBILITY OF TULIP BULBS TO INFECTION BY FUSARIUM OXYSPORUM (B.H.H. Bergman, J.C.M. Beijersbergen) |
| ENZYMATIC LIBERATION OF TULIPALIN (α-METHYLENEBUTYROL-ACTONE), A FUNGITOXIC SUBSTANCE ISOLATED FROM TULIPS (J.C.M. Beijersbergen, Cath.B.G. Lemmers) |
| THE INFECTION OF BULBS BY PENICILLIUM SP. (G.J. Saaltink) |
| BUD NECROSIS IN TULIPS, A MULTIFACTORIAL DISORDER (W.J. de Munk) |
| NARCISSUS EELWORM DITYLENCHUS DIPSACI: SOME ASPECTS OF ITS BIOLOGY AND CONTROL BY THIONAZIN (J.J. Hesling) |
| CHEMICAL CONTROL OF DITYLENCHUS DIPSACI IN NARCISSUS AND TULIP (N.G.M. Hague, M. Kondrollochis) |
| HORIZONTAL MIGRATION OF THE TULIP RACE OF STEM NEMATODE DITYLENCHUS DIPSACI (KUEHN) FROM ARTIFICIALLY INFECTED TULIP BULBS PLANTED ON A SANDY AND A HEAVY CLAY SOIL (W.A. Windrich) |
| EXPERIMENTS ON TULIP BULB PRODUCTION IN RELATION TO CUCUMBER MOSAIC VIRUS (M. Yamamoto) |
| ASTER YELLOWS IN GLADIOLUS IN THE NETHERLANDS: CURE BY HOT-WATER TREATMENT AND PREVENTION OF SPREAD WITH SYSTEMIC INSECTICIDES (D.H.M. van Slogteren) |
| INSTABILITY OF SOME FLEXUOUS ROD-SHAPED VIRUS PARTICLES DURING PURIFICATION* (G.A. de Zoeten, C.E. Fribourg) |
| A NEW DISEASE OF TULIP RESEMBLING AUGUSTA DISEASE* (W.P. Mowat) |
| ALUMINUM FOIL MULCH REDUCES APHID TRANSMISSION OF CUCUMBER MOSAIC VIRUS IN GLADIOLUS (A. Bing, G.V. Johnson) |
| OCCURRENCE AND IMPORTANCE OF VIRUSES INFECTING NARCISSUS IN BRITAIN (A.A. Brunt) |
| WEED COMPETITION IN NARCISSUS CROPS (H.M. Lawson) |
| THE SELECTIVITY OF SOME HERBICIDES IN BULB GROWING (J.L.P. van Oorschot, M. de Rooy) |
| EFFECT OF SIZE AND SHAPE OF TULIP BULBS ON ROOT DEVELOPMENT (J.J. Schuurman) |
| TULIP ROOT BEHAVIOUR AND AERATION REQUIREMENTS (L.K. Wiersum) |
| EFFECT OF COMPACTION ON PHYSICAL PROPERTIES OF SOIL AND ROOT GROWTH OF ORNAMENTAL BULBS (F.A.M. de Haan, G.G.M. van der Valk) |
| INFLUENCE OF SHORT PERIODS OF RESTRICTED SOIL AERATION ON DEVELOPMENT OF TULIPS (G.G.M. van der Valk) |
| SOIL STRUCTURE PROBLEMS IN TULIP CULTURE (P. Boekel) |
| THE USE OF ORGANIC MATERIALS IN FLOWERBULB GROWING (J.A. van den Berg) |
| FROST INJURY TO FLOWERBULB CROPS (G.G.M. van der Valk) |
| APPLIED MECHANIZATION OF TULIP-BULB PRODUCTION ON CLAY AND SANDY-CLAY SOILS (J. van den Broek) |
| STRUCTURAL PROBLEMS ON BULB HOLDINGS IN THE NETHERLANDS (W.G. de Haan) |
| ECONOMIC ASPECTS OF FLOWER PRODUCTION ON BULB-GROWING FARMS (C.O.N. de Vroomen) |
| TRENDS IN THE MARKETING AND 'CONSUMPTION' OF FLOWER BULBS (N.C. Hofman) |
| EXPORT INSPECTION OF FLOWERBULBS IN THE NETHERLANDS (J.A.J. Veenenbos) |
| FIELD INSPECTION OF BULBOUS PLANTS IN THE NETHERLANDS (H. van Os) |
| BULB GROWING IN POLAND (H. Dargiewicz) |
| MECHANIZATION OF ANEMONE CORM PRODUCTION (H.J. Eaton) |
| SOME RESULTS OF BREEDING RESEARCH ON TULIPS (TULIPA SP.) (W. Horn) |
| PROSPECTS OF PRESELECTION IN TULIP BREEDING (J.P. van Eijk) |
| MUTATION BREEDING IN FLOWER BULBS (C. Broertjes, H.Y. Alkema) |
| SHORTENING THE PERIOD FROM SEED TO A FLOWERING BULB IN TULIP* (E.J. Fortanier) |
| POLYPLOIDY IN FREESIAS (A.E. Zeilinga) |
| METHODICAL PROBLEMS IN GLADIOLUS HYBRIDIZATION (A.N. Gromov) |
| REGENERATION OF ISOLATED BULB SCALE SEGMENTS OF HYACINTH* (R.L.M. Pierik, J. Woets) |
| EFFECTS OF TEMPERATURE, LIGHT, SUGARS AND GIBBERELLIN A3 ON THE GROWTH IN VITRO OF TERMINAL BUDS OF TULIP (J. van Bragt) |
