Apple Powdery Mildew and Its Control in the Arid Regions of the Pacific NorthwestU.S. Department of Agriculture, 1918 - 28 páginas Of control measures -- Dormant sprays. pp. 23. |
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Apple Powdery Mildew and Its Control in the Arid Regions of the Pacific ... D. F. Fisher Visualização integral - 1918 |
Palavras e frases frequentes
50 gallons ammoniacal copper carbonate appearance APPLE POWDERY MILDEW apple scab application of sulphur ascospores Ballard and Volck Baumé Ben Davis apple Black Ben Davis blossom Bordeaux mixture burning sunlight cent colloidal sulphur color conidia control established crease crop of fruit diluted disease dormant spray effect felted mycelium foliage infection Formula free sulphur fruit burning fruit injury fungicidal fungus gallons of spray gallons of water ground sulphur material growing season growth hot weather iron sulphate Jonathan trees July 15 June 11 lead arsenate leaf lime-sulphur solution Maxi mildew control mildew infection orchards overwintering Pajaro Valley perithecia plat Podosphaera leucotricha polysulphid pounds to 50 pruning Pryor Red trees Pryor Red variety 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. Dept Volck 12 Wash Wenatchee Valley Winesap