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Agricultural College AGRICULTURE OF SOUTH America amongst appearance appendages ascospore attack Australian Wheat bark become Berk Berkeley berry blotches branches brittle bunches burst canes caused cells centre chain conditions conidia conidial stage conidiophore bearing conidium cultivated vines currant Dairy dark-brown Department of Agriculture develop diseased leaves DOWNY MILDEW Plasmopara early summer enter the tissues epidemic Europe exceptionally fall favor filaments flowers foliage following is Massee's following spring form of fruit fungi Fungus forming white germinate GRAPE VINE MILDEWS growers growing growth haustoria headway highly mag Horticultural humidity identity injuries Irish Potato Irrigation Massee's description MILDEW Oidium Tuckerii Milling Characteristics moisture mycelium present number Oidium Tuckeri outbreak pale patches perithecia Peronospora posted powdery mildew preventive produced Pruning Quinn remedy Renmark resting spores ripened Season soil South Australia spots sulphur sultana temperature tions trellis Uncinula spiralis upper surface vine leaf vinegrowers vineyards vitieola whilst wind winter young shoots zoospores