CIRCULAR NO. 27 Issued FEB., 1928; Revised SEPTEMBER, 1930 



UNITED STATES DEPARTMENT OF AGRICULTURE 



WASHINGTON, D. C. 



SOME MUSHROOM DISEASES AND THEIR CARRIERS 



By Vera K. Charles, Associate Pathologist, Office of Mycology and Disease 

 Survey, Bureau of Plant Industry, and C. H. Popenoe, Associate Entomologist, 

 Division of Truck-Crop Insects, Bureau of Entomology 1 



The early history of mushroom cultivation in the United States 

 contains no reports of serious troubles caused by fungous diseases. 

 This is probably due to the fact that the growers were widely sepa- 



A CASE OF BUBBLES 



rated geographically, and that the diseases, while occurring to a 

 limited extent, were not readily distributed. 



1 The first part of this circular, dealing with fungous diseases of mushrooms, was written 

 by Vera K. Charles, and the second part, on insect contamination in mushroom houses, by 

 C. H. Popenoe. 



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