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acid Agric ammonia and nitrate Appl autoclaving base-dressed BEWLEY Biol blotchy fruit Blotchy Ripening Carnation cent Cheshunt chloropicrin chlorosis Chron chrysanthemum compounds concentrations contained cucumber cultures deficiency deuteronymph Didymella discs disease ecdysis eelworm effect eggs deposited experiments female mites floating foliage formaldehyde fungi Fungicides fungus given in Table Glasshouse Crops glasshouse soils growth hind-gut hoof and horn Hort increased inoculated instar investigation isolated larvae leaf leaf-discs leaflet leaves lesions lycopersici manure Maytime mineralization moisture Mosaic nitrate nitrifying nitrogen normal number of eggs nutrient solution observed obtained OWEN parathion percentage potassium pots Red Spider Red Spider Mite rhizosphere root surface samples seed seedlings showed soluble SPEYER spores spray steam sterilization steamed plots steamed soil submerged sulphate sulphur symptoms temperature tensiometers tests tomato plants Tons p4 tons per acre treatment trusses U/F ratio unsteamed urea-formaldehyde variety virus water-soluble