Peach scab and its control . Peach Leaf and Twigs Attacked by Cladosporium carpophilum. Fig. 1.—Lower surface of badly diseased Heath leaf, showing abundant infection. From ChevyChase, Md., October 5,1915. (Naturalsize.) Fig. 2.—Badly diseased Elberta twigs. From ChevyChase, Md., August 6, 1915. (Natural size.) Fig. 3.—Elberta twigs, showing lesions as theyappear in the spring following infection, with abundant production of conidial tufts: a and 6,Small lesions, evidently the result of late infection; c and d fully developed lesions. FromCornelia, Ga., May 31, 1912. (Magnified, X 2.) PEACH SC
Peach scab and its control . Peach Leaf and Twigs Attacked by Cladosporium carpophilum. Fig. 1.—Lower surface of badly diseased Heath leaf, showing abundant infection. From ChevyChase, Md., October 5,1915. (Naturalsize.) Fig. 2.—Badly diseased Elberta twigs. From ChevyChase, Md., August 6, 1915. (Natural size.) Fig. 3.—Elberta twigs, showing lesions as theyappear in the spring following infection, with abundant production of conidial tufts: a and 6,Small lesions, evidently the result of late infection; c and d fully developed lesions. FromCornelia, Ga., May 31, 1912. (Magnified, X 2.) PEACH SCAB AND ITS CONTROL. 9. contrast, the fungal tissue took up the red and orange quite freely,while the dividing cells of the cork-forming layers stained a strikingblue and the normal host cells below a brightred. Fruit lesions.—In the early stages of fruitinfection the slender, branching, hyaline,septate hyphse of the fungus are found closelyappressed to the inner walls of the irregularsurface cells of the host. This early develop-ment is most abundant in the minute depres-sions about the bases of the hairs, whereconditions seem to be particularly favorablefor the development of the parasite (fig. 1).As the fungus becomes firmly established,conidiophores are produced, while the vege-tative hyphse branch and thicken until theymay entirely cover the area of individual cells thicken and darken,while transverse and longitudinal divisionstake place, often resulting in the formationof irregular fungal masses ^.yq or six cells indepth (fig. 2, a). This later development,too, is particularly abundant
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