Fungi and fungicides; a practical manual, concerning the fungous diseases of cultivated plants and the means of preventing their ravages . a he FIG. 32. PLUM , b. Fruit scab; c, f Iuit spot. plums. It appears when the fruit is ripening, in theshape of minute round specks, of a paler or grayer colorthan the surrounding skin. These usually enlarge asthe fruit ripens, finally attaining a diameter of a quarter,or even half an inch. Several spots sometimes runtogether to form a blotch. The mycelium of the fungus THE PLUM LEAF-BLIGHT 63 does not j)enetrate deeply into the fruit, and in its
Fungi and fungicides; a practical manual, concerning the fungous diseases of cultivated plants and the means of preventing their ravages . a he FIG. 32. PLUM , b. Fruit scab; c, f Iuit spot. plums. It appears when the fruit is ripening, in theshape of minute round specks, of a paler or grayer colorthan the surrounding skin. These usually enlarge asthe fruit ripens, finally attaining a diameter of a quarter,or even half an inch. Several spots sometimes runtogether to form a blotch. The mycelium of the fungus THE PLUM LEAF-BLIGHT 63 does not j)enetrate deeply into the fruit, and in itselfthe disease visually causes little direct damage; but indi-rectly it is often injurious, by making cracks in the skinthrough which the spores of other fungi get entrance tothe pulp of the fruit. Presumably spraying with Bor-deaux mixture will have a preventive effect upon it. THE PLUM FRUIT-SPOT Professor L. H. Bailey has called attention to afruit spot affecting certain native varieties of plums inthe south (Fig. 32 c). It is caused by a species ofPhoma, and is believed to be allied to the black rot ofthe grape, and to be contro
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectpathoge, bookyear1896
