Growth and cation accumulation in spray carnations / L.S. SpithostResults of liquid feeding in the production of bedding plants / by G.A. BoertjeInfection of tomato seed by different strains of tobacco mosaic virus with particular reference to the symptomless mutant MII-16 / by A.Th.B. RastA whitefly-transmitted disease of glasshouse vegetables, a novelty for Europe / by H.J.M. van Dorst, N. Huijberts and L. BosThree physiological disorders in glasshouse cultivation / by N. van BerkelNitrogen, potash and magnesium nutrition of some vegetable fruit crops under glass / by C. Sonneveld and S.J. VoogtEffect of season on early tomato growth and development rates / by D. KlapwijkTomato plant growth as effected by horizontally unequal osmotic concentrations in rock-wool / by A. Cerdá and J.P.N.L. Roorda van EysingaGrowth of tomato plants in a split-root system as affected by various boron levels in the nutrient solution / by A. Cerdá and J.P.N.L. Roorda van EysingaThe parasite-host relationship between Encarsia formosa (Hym., Aphelinidae) and Trialeurodes vaporariorum (Hom., Aleyrodidae) : population dynamics of parasite and host in a large, commercial glasshouse and test of the parasite-introduction method used in the Netherlands (first part) / by Mariek H. Eggenkamp-Rotteveel Mansveld ... [et al.]Items for application of macro-elements in soilless cultures / by C. SonneveldPhytophthora root rot of sweet pepper / by N.A.M. van SteekelenburgHet door kaswittevlieg overgebrachte pseudo-slavergelingsvirus, een novum voor Europa / door L. Bos, H.J.M. van Dorst en N. HuijbertsThe response of plant species used in agriculture and horticulture to viroid infections / W.Th. Runia and D. PetersEconomical optimization of energy consumption in an early cucumber crop / H. Challa ... [et al.]Glasshouse cucumber, stem elongation and earliness of fruit production as influenced by temperature and planting date / G. HeijGlasshouse cucumber, effects of planting date and night temperature on flowering and fruit development / P.J.A.L. de Lint and G. HeijInfluence of the glasshouse climate on development of diseases in a cucumber crop with special reference to stem and fruit rot caused by Didymella bryoniae / by N.A.M. van Steekelenburg and J. van de VoorenEconomic aspects of cucumber crowing in the Netherlands / by A.J. de VisserEffect of day and nigth temperatures on earliness and fruitproduction in cucumber / by J. van de VoorenA physiological disorder in cucumber under low day temperature / by J. van de Vooren and J.A.M. van UffelenComparison of inoculation methods with Didymella bryoniae on Cucumis sativus / by N.A.M. van SteekelenburgIrrigation and nutrition of glasshouse cucumbers in the Netherlands / by C. SonneveldGrowing cucumbers and tomatoes in rockwool / C. SonneveldSeasonal effects on the cropping-cycle of lettuce in glasshouses during the winter / D. KlapwijkThe application of manganese in nutrient solutions for tomatoes grown in a recirculating system / C. Sonneveld, S.J. VoogtWitte vliegen in Nederland (homoptera, Aleyrodidae) / F.A. Bink, R.M. Bink-Moenen & J. WoetsThe biological control situation in Dutch glasshouses : problems with Trialeurodes vaporariorum (Westwood), Liriomuza brioniae kalt, and myzus persicae sulz / J.C. van Lenteren, P.M.J. Ramakers & J. Woets