. Fungous diseases of plants : with chapters on physiology, culture methods and technique . Fungi in agriculture. Fig. 99. Neocosmospora vasinfecta. (c after Erw. F. Smith) a, the fungus in xylem of stem; b and c, conidial stages from cultures and hence through the root system. This is believed to be the sole method of infection with the form on cotton and cowpea. It is also believed that healthy plants are directly affected with- out the assistance of any other organism or mechanical effect causing an injury through which the fungus might obtain access. The mycelium of the plant is at first f
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. Fungous diseases of plants : with chapters on physiology, culture methods and technique . Fungi in agriculture. Fig. 99. Neocosmospora vasinfecta. (c after Erw. F. Smith) a, the fungus in xylem of stem; b and c, conidial stages from cultures and hence through the root system. This is believed to be the sole method of infection with the form on cotton and cowpea. It is also believed that healthy plants are directly affected with- out the assistance of any other organism or mechanical effect causing an injury through which the fungus might obtain access. The mycelium of the plant is at first found most abundantly in the vessels of the xylem (Fig. 99, a); but in later stages of the disease it may pervade other tissues. Upon the death of the plant it comes to the surface along the lines of least resistance; hence it appears lineally distributed in the areas between the vertical lines of bast. The fungous hyphae are, as they occur in the host plant, yellowish in color, considerably septate, and irregularly branched. According to Atkinson conidia may be. 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 work.. Duggar, Benjamin M. (Benjamin Minge), 1872-1956. Boston ; New York : Ginn