. [Bulletins on forest pathology : from Bulletin , Washington, , 1913-1925]. Trees; Plant diseases. | BULLETIN No. 380 Contribution from the Bureau of Plant Industry WM. A. TAYLOR, Chief. Washington, D. C. PROFESSIONAL PAPER January 15, 1917 ENDOTHIA PARASITICA AND RELATED SPECIES. By C. L. Shear, Pathologist, and Neil E. Stevens,1 Pathologist, Fruit-Disease Investigations, and Ruby J. Tiller, Scientific Assistant, Office of Investiga- tions in Forest Pathology. CONTENTS. Taxonomy 1 Introduction 1 The genus Endothia 3 The species of Endothia 13 Morphology and development 22 Myceliu
. [Bulletins on forest pathology : from Bulletin , Washington, , 1913-1925]. Trees; Plant diseases. | BULLETIN No. 380 Contribution from the Bureau of Plant Industry WM. A. TAYLOR, Chief. Washington, D. C. PROFESSIONAL PAPER January 15, 1917 ENDOTHIA PARASITICA AND RELATED SPECIES. By C. L. Shear, Pathologist, and Neil E. Stevens,1 Pathologist, Fruit-Disease Investigations, and Ruby J. Tiller, Scientific Assistant, Office of Investiga- tions in Forest Pathology. CONTENTS. Taxonomy 1 Introduction 1 The genus Endothia 3 The species of Endothia 13 Morphology and development 22 Mycelium 22 Stromata 23 Spore measurements 30 Physiology 36 Cultural studies 36 Page. Physiology—Continued. Distribution of the species of 48 Discovery of Endothia parasitica in China. 54 Discovery of Endothia parasitica in Japan 58 Present distribution of Endothia para- sitica in America 59 Host relations of the species of Endothia. 59 Summary 74 Literature cited 77 TAXONOMY. INTRODUCTION. The discovery of a serious canker of the chestnut in the New York Zoological Park in 1904, by Merkel (49),2 first attracted the atten- tion of pathologists and foresters to what has proved to be one of the most serious epidemics of a plant disease ever known in this country. The fungus which was found associated with these cankers (PL I and PL II, fig. 1) and soon demonstrated experimentally to be their cause was described by Murrill (57) in 1906 as a new species of Diaporthe (D. parasitica). Search for the fungus in other places in New York and vicinity soon showed that it was already estab- lished and apparently rapidly spreading. Investigations which have been continued and extended from year to year have shown 1 Formerly Pathologist, Office of Investigations in Forest Pathology. 2 Serial numbers in parentheses refer to " Literature cited," at the end of the bulletin. Note.—This bulletin is of value to botanists, especially plant pathologists and mycolo- gists, and to al
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