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A. F. Murant A. T. Jones acid Agricultural aldicarb aphids applied assess Association August B. D. Harrison b.sc benomyl berries Biology Boag Botrytis Brassica Brassica oleracea bulbs calabrese Cambridge Favourite carotovora carrot cells cultivars cultural decreased detected differences dinoseb diseases Dundee effect emergence experiment fabae field beans flowering genotypes germination glasshouse Glen Clova growth harvest Horticultural Research Institute hybrids increased infected inoculated isolates July leaf lesions levels Longidorus Malling Jewel Maris Piper medium narcissus nematodes nepovirus numbers obtained oospores oxamyl particles pathogen ph.d Plant Breeding plots potato pots produced progenies protoplasts R. A. Fox raspberry red core Rept resistance ringspot root Saladin samples Scotland Scottish Horticultural Research Section seed seedling selections SHRI soft fruit sowing species sprays sprout strains strawberry susceptible T. W. Hegarty t/ha temperature tested tobacco rattle virus treatment trial tubers twin-scales vegetable Virology virus viruses yield