. [Bulletins on forest pathology : from Bulletin , Washington, , 1913-1925]. Trees; Plant diseases. Dept. of Agriculture PLATE Culture Tubes Showing Negative and Positive Results. A, Culture tube showing a negative result; no fungous growth has developed from the fragment of wood. The white area on the surface of the agar is due to reflections of light. B, Culture tube showing a positive result; the fungus has grown from the fragment of infected wood, and a small sporophore (Pholiota adiposa) has Please note that these images are extracted from scanned page images t
. [Bulletins on forest pathology : from Bulletin , Washington, , 1913-1925]. Trees; Plant diseases. Dept. of Agriculture PLATE Culture Tubes Showing Negative and Positive Results. A, Culture tube showing a negative result; no fungous growth has developed from the fragment of wood. The white area on the surface of the agar is due to reflections of light. B, Culture tube showing a positive result; the fungus has grown from the fragment of infected wood, and a small sporophore (Pholiota adiposa) has 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 United States. Dept. of Agriculture. [Washington : U. S. Dept. of Agriculture]
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Keywords: ., bookcentury1900, bookdecade1910, bookpublisherwashi, bookyear1913
