. Recent research on conifer needle diseases : conference proceedings, October 14-18, 1984, Gulfport, Mississippi. Conifers Diseases and pests Congresses. Colonisation depends upon needle senescence or damage,. 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 Peterson, Glenn W; International Union of Forestry Research Organizations. Working Party on Needle Diseases. Washington, D. C. : U. S. Dept. of Agriculture,

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. Recent research on conifer needle diseases : conference proceedings, October 14-18, 1984, Gulfport, Mississippi. Conifers Diseases and pests Congresses. Colonisation depends upon needle senescence or damage,. 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 Peterson, Glenn W; International Union of Forestry Research Organizations. Working Party on Needle Diseases. Washington, D. C. : U. S. Dept. of Agriculture, Forest Service

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