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Ailsa Craig amount appear Aucuba Aucuba Mosaic average baked soil base Blaby blotchy fruits blotchy ripening carbon dioxide Cardyox chamber Cheshunt colour Complete Artificials Control cresylic acid crop cubic feet cucumber houses cucumber plants dressing effect eggs experiments fertilisers flats per foot foliage fumigation fungus glasshouse Grade grass green manure growers growth healthy hibernating hyphae increase infection injury inoculated Investigations July June killed leaf lime manurial treatment Manx Marvel maturation period mixture mosaic disease naphthalene nitrate nitrogen normal nurseries obtained old bed parasite phosphates phosphoric acid plots potash pots Purple green red spider roots scorched season seedlings Sept showed soft soap spores spraying stable manure stages steamed stem sterilised Sterilised Soil straw sulphate of potash sulphur symptoms Table temperature tissue Tobacco tomato houses tomato plants Tons per Acre Top-dressing Total trusses unmanured vapour Variety white-fly woodlice yield