. Bulletin of the Department of Agriculture. Agriculture; Agriculture. PEACH SCAB AND ITS COISTTEOL. 13. Fig. 5.— Cladosporium carpophilum: a, Con- idiophores and conidia from fruit lesions; 6, conldiophores and conidia from twig lesions; c, conidiophore from leaf lesion; d, and e, fragments of mycelium from Lima-bean agar culture, showing develop- ment ofehlamydospores. Camera-lueida drawing. (Magnified 485 times.) the more exposed cells thicken and darken and the individual cells may assume the characters of chlamydospores (fig, 5, d and e). On old cul- tures on steamed peach twigs or c
. Bulletin of the Department of Agriculture. Agriculture; Agriculture. PEACH SCAB AND ITS COISTTEOL. 13. Fig. 5.— Cladosporium carpophilum: a, Con- idiophores and conidia from fruit lesions; 6, conldiophores and conidia from twig lesions; c, conidiophore from leaf lesion; d, and e, fragments of mycelium from Lima-bean agar culture, showing develop- ment ofehlamydospores. Camera-lueida drawing. (Magnified 485 times.) the more exposed cells thicken and darken and the individual cells may assume the characters of chlamydospores (fig, 5, d and e). On old cul- tures on steamed peach twigs or certain agar preparations, small, irreg- ularly rounded to distinctly elongated, olivaceous, sclerotioid masses, usually less than one-third of a milli- meter in diameter, may be found. The outer cells of these bodies are thick walled and olivaceous and frequently bear conidiophores. The inner cells are thin walled and colorless, with an abmidant content of oily material. Conidiopliores.—T h e conidiophores (fig. 5, a, h, and c) are short, erect, more or less flexuous, one to several septate, rarely branched, ohvaceous hyphse, distinctly enlarged at the base and often tapering irregularly toward the apex. Their dimensions vary with conditions, though in nature they are fairly uniform during the early stages of sporulation. The conidia are produced acrogenously, beginning usually when the spo- rophores are about 30 to 35 n long. The conidiophores elongate apically as conidia are developed, the places of attachment of de- tached spores being marked ordinarily by small wartUke processes or by geniculations on the sporophores. The extent of this type of elongation, which is quite variable, determines the ultimate length of the conidiophores. On the overwintered twig lesions the conidiophores borne from the subcuticular stromateoid fungal masses occur typically in tufts (fig. 4), and tend to be somewhat shorter and thicker than those occurring elsewhere in nature. On the fruit th
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