. Botany for agricultural students . Botany. Fig. 306.— a bunch of Grapes partially de- stroyed by the Downy Mildew. From Farmer's Bulletin 28^, U. S. Dept. of Fig. 307. — The haustoria of the Downy Mildew reaching into the cells of the grape, h, hypha; a, haustoria. From Bulletin 2H, Ohio Agr. Exp. Sta. furnished by the leaves and as a result both fruit and vine may suffer. Often the fruit is directly attacked and de- stroyed. After the Mildew is well established within the tissues of the hosts, it sends through the stomata numerous branches which constitute the superficial down
. Botany for agricultural students . Botany. Fig. 306.— a bunch of Grapes partially de- stroyed by the Downy Mildew. From Farmer's Bulletin 28^, U. S. Dept. of Fig. 307. — The haustoria of the Downy Mildew reaching into the cells of the grape, h, hypha; a, haustoria. From Bulletin 2H, Ohio Agr. Exp. Sta. furnished by the leaves and as a result both fruit and vine may suffer. Often the fruit is directly attacked and de- stroyed. After the Mildew is well established within the tissues of the hosts, it sends through the stomata numerous branches which constitute the superficial downy patches characteristic of the parasite {Fig. 308). On the tips of these protruding hyphae are produced small globular bodies known as conidio- spores or conidia, and the hyphae- bearing them are called conidiophores which means "conidia ; The conidia are really small sporangia which break off and are. 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 Martin, John N. (John Nathan), b. 1875. New York : John Wiley & Sons, Inc.
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectbotany, bookyear1919
