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Apple powdery mildew and its control in the arid regions of the Pacific ...
D. F. Fisher
Visualização integral - 1918
50 gallons ammoniacal copper carbonate appearance apple powdery mildew apple scab application of sulphur ascospores ascus Ballard and Volck Baume Ben Davis apple Black Ben Davis blossom Bordeaux mixture BULLETIN 712 burning sunlight colloidal sulphur color conidia control established crease crop of fruit DEPARTMENT OF AGRICULTURE diluted disease dormant spray effect felted mycelium foliage infection foliage injury Formula free sulphur fruit burning fruit injury fungicidal fungus gallons of spray gallons of water ground sulphur material growing season growth horticultural inspector hot weather iron sulphate Jonathan trees July 15 June 15 lead arsenate leaf lime-sulphur solution mildew control mildew infection orchards overwintering Pacific Northwest Pajaro Valley perithecia plat polysulphid pounds to 50 pruning Pryor Red trees Slight sodium-sulphur spores spray material sprayed with lime-sulphur sprays applied Stayman sulphids sulphur injury sulphur spotting sulphur sprays susceptible temperatures terminal tion U. S. DEPARTMENT Volck 12 Wenatchee Valley Winesap