. Black rot, leaf spot and canker of pomaceous fruits. Black rot; Leaf spots; Canker (Plant disease); Apples. Fig. 26. PART OF CROSS SECTION OF SCLEROTIUM varies, apparently depending somewhat on age and nutri- tion. Young and well-nourished cells are densely granular, while older threads contain vacuoles and glycogen drops in abun- dance. sclerotia (Plate xiii, 3, and Fig. 26). Sclerotial bodies have been found in nutrient media of high sugar content and in oat agar cultures of ascospores from Hamamelis virginiana. Walker (1908:38) reports the development of sclerotium-like bodies resem- blin
. Black rot, leaf spot and canker of pomaceous fruits. Black rot; Leaf spots; Canker (Plant disease); Apples. Fig. 26. PART OF CROSS SECTION OF SCLEROTIUM varies, apparently depending somewhat on age and nutri- tion. Young and well-nourished cells are densely granular, while older threads contain vacuoles and glycogen drops in abun- dance. sclerotia (Plate xiii, 3, and Fig. 26). Sclerotial bodies have been found in nutrient media of high sugar content and in oat agar cultures of ascospores from Hamamelis virginiana. Walker (1908:38) reports the development of sclerotium-like bodies resem- bling pycnidia on artificial media. They have also been ob- served by Baccarini (1890:67) just under the skin of the apple. chlamydospores (Fig. 27). Chlamydospores have doubtfully been observed by the writer in host tissues. In a few cases a suggestion of Fig. 27. CHLAMYDOSPORES OF PHYSALOSPORA CYDONIAE Types of chlamydospores found in pure cultures. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Hesler, L. R. (Lexemuel Ray). Ithaca, N. Y. : Cornell University
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectblackro, bookyear1916
