. Annual report of the Agricultural Experiment Station. Cornell University. Agricultural Experiment Station; Agriculture -- New York (State). 208 Bulletin 132. all parts of the leaf, and by careful observation the}' may be seen with the naked eye. A section of a leaf through one of these minute pycnidia is shown in Figure 52. At a is shown a cross section of the more or less spherical fruit body. It is deeply immersed in the tissues of the leaf, and the walls are stout and appressed. From these walls arise a forest-like mass of minute filaments, or basidia,. 51—Spots of late blight on a celery
. Annual report of the Agricultural Experiment Station. Cornell University. Agricultural Experiment Station; Agriculture -- New York (State). 208 Bulletin 132. all parts of the leaf, and by careful observation the}' may be seen with the naked eye. A section of a leaf through one of these minute pycnidia is shown in Figure 52. At a is shown a cross section of the more or less spherical fruit body. It is deeply immersed in the tissues of the leaf, and the walls are stout and appressed. From these walls arise a forest-like mass of minute filaments, or basidia,. 51—Spots of late blight on a celery leaf. bearing the needle-shaped spores, or reproductive bodies of the fungus. When ripe, these spores are doubtless expelled through the mouth of the pycnidium by means of absorbed water, and then they are readily scattered by wind and rain for the immediate dissemination of the fungus. The spores readily germinate, giv- ing rise to the delicate tube-like filaments, which enter the tissues of the leaf as mentioned for the 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 Cornell University. Agricultural Experiment Station. Ithaca, N. Y. : The University
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