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Ailsa Craig amount appeared applied aucuba average baked soil base Blaby blotchy carbon dioxide carnation Cent Cheshunt Chrysanthemum commercial nurseries Complete Artificials cresylic acid crop cubic feet cucumber cucumber houses developed effect eggs emulsion experiments fertilisers foliage formaldehyde fruit fumigation fungus glasshouse Grass growers growth healthy hibernating humidity inches increase infection injury inoculated Investigations July June killed leaf mould leaves lime manurial treatment Manx Marvel maturation period mildew mosaic disease naphthalene nitrate nitrogen obtained parasite phosphates phosphoric acid plots potash pots Red Spider Red Spider Mite ripening roots scorch season Sept shewed showed sodium soft soap solution spores sporulation spraying stable manure stages steamed stem sterilised straw sulphate of potash sulphur symptoms Table temperature tissue tomato houses tomato plants tons per acre top dressing Total truss unmanured Variety white-fly Wilt yield