. • ..^jg|i§ BmiS'V Jfl • "^ "^1 J ) k JSk JH ^^B 1 J if Fig, 12.—Spores of carrot-blight fungi: A, Cercospora spores; B, Macrosporium spores. (Greatly enlarged.) Irregular, dead spots appear on the leaves, dark-brown lines on the peti- oles and stems, and a blighting on the floral parts. Sometimes this bac- terial infection, caused by Phytonionas carotae, is confined to one side

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Keywords: ., bookcentury1900, booksubjectagriculturalpests, booksubjectplantd