. Annual report of the Agricultural Experiment Station. Cornell University. Agricultural Experiment Station; Agriculture -- New York (State). 283 Bulletin 145. general leaf tissue, gj / is a section through the hollow mature fruit body, or pycnidium, con- taining the countless spores. Each spore was originally borne on a little pedicel, or basidium, which seems to grow out from the wall. When the pyc- nidium is ripe, water is absorbed, and these masses of spores ooze out of the mouth of the pycnidium in a long horn-like pro- jection, very dark in color. Here, then, they are at the surface read
. Annual report of the Agricultural Experiment Station. Cornell University. Agricultural Experiment Station; Agriculture -- New York (State). 283 Bulletin 145. general leaf tissue, gj / is a section through the hollow mature fruit body, or pycnidium, con- taining the countless spores. Each spore was originally borne on a little pedicel, or basidium, which seems to grow out from the wall. When the pyc- nidium is ripe, water is absorbed, and these masses of spores ooze out of the mouth of the pycnidium in a long horn-like pro- jection, very dark in color. Here, then, they are at the surface ready for dis- semination. With suitable conditions of moisture they germinate readily upon other pear leaves. Some germinating spores highly magnified are shown in figure 165. The germ tubes arise from either end (c and d), or from the middle (a, b, e and f) of the spore, and readily .penetrate the tissues of the leaf for the final production of another leaf 164.—Culture 0/ the leaf spot fungus on pods and stems of bean. cultures. Here the fungus grew slowly at first, producing after several weeks tlie pycnidia of the Scptoria, After several transfers this fungus grows quite luxuriantly on bean pods or stems, as seen in figure 164, pro- ducing the pycnidia in a short time, and the pycnidia are then not so defi- nite in form but formed of a very loose stromatic mass. The submerged liyphse are dark in color, while the aerial growth is dense and white, except the stromatic mass inclosing the pycnidium. I have had cultures for eight- een months; and although they have been subjected to various climatic conditions, nothing of further interest has as yet come from them. In nature the fungus is being closely watched for other stages, but I cun say. 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 Unive
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