FILBERT OR HAZELNUT. 139 



In reply to an inquiry directed to the U. S. Depart- 

 ment of Agriculture, Division of Vegetable Pathology, 

 I received the following : 



WASHINGTON, D. C., Aug. 4. 1894. 

 DEAR SIR: 



Your letter of Aug. 2, relating to the disease of the filbert, 

 is at hand. In reply I have to say that we have not investi- 

 gated this trouble, and are therefore unable to furnish you 

 with any definite information upon it. Specimens of the dis- 

 ease, as you describe it, have never been, so far as I know, re- 

 ferred to the Division, nor am I able to find any record of any 

 such disease in foreign or domestic literature. If you will 

 send us specimens we shall be pleased to examine them and 

 furnish you a report. We should also be pleased to have any 

 information from you hi regard to the manner in which the 

 disease works. Very truly, 



B. T. GALLOWAY, Chief of Division. 



The specimens requested were forwarded promptly 

 by mail, and in the absence of the Chief of Division, 

 they fell into the hands of one of his assistants, who re- 

 ported as follows : 



WASHINGTON, D. C., Aug. 14, 1894. 

 DEAR SIR: 



Your letter of Aug. 7 is received, together with" the speci- 

 mens. ^ The stems of the Corylus are affected with one of the 

 Pyrenomycetes. Cryptospora anomala, Pk. The fungus is 

 described in "North American Pyrenomycetes," by Ellis and 

 Everhart, p. 531. It attacks Corylus Americana, but appears 

 to be worst on the European varieties, as you say. The pus- 

 tules appear first on the young branches, and later on the 

 older ones and on the trunk. The roots are not killed. 



The only remedy known is to cut out and burn the dis- 

 eased stems. Whether Bordeaux mixture or any other copper 

 solution will protect the shrub from attack, is not known. So 

 far as I know, it has not been tried. It is probable, however, 

 that if the stems were thoroughly sprayed with the Bordeaux 

 mixture they would be protected from attack. The mycelium 

 of the fungus grows into the cambium and practically girdles 

 the stems. The black pustules contain the spores. 



Very truly yours, 

 ALBERT F. WOODS, Acting Chief. 



