46 FUNGI AND FUNGICIDES 



been noticed. Consequently, such cultural methods as 

 will tend to produce a slow, steady growth are to be 

 adopted. 



Literature. The really valuable publications con- 

 cerning pear blight date from Professor Burrill's an- 

 nouncement of the genuine cause in 1880. His articles 

 may be found in the following publications : Transac- 

 tions Illinois State Horticultural Society, 1880, pp. 157- 

 167 ; 1883, pp. 46-49 ; Report American Pomological 

 Society, 1880; Report Trustees Illinois Industrial Uni- 

 versity, 1880 ; Transactions Illinois Department of Ag- 

 riculture, 1880, pp. 433-436. Professor J. 0. Arthur 

 has also published a number of valuable papers. A sum- 

 mary of his results may be found in the Report U. S. 

 Department of Agriculture, 1886, .pp. 125-129; Report 

 of the American Pomological Society, 1885 ; and Report 

 of the Michigan Horticultural Society, 1885, pp. 173-177. 

 More recently Mr. M. B. Waite has been investigating 

 the disease. His results may be looked for in the publi- 

 cations of the Division of Vegetable Pathology. 



The Pear Scab 



Fusicladium pyrinum 



This disease is very similar to apple scab, the fun- 

 gus, in fact, being believed by many botanists to be the 

 same species. At any rate, the chief points in the life- 

 history and remedial treatment are the same as for the 

 apple disease. 



Care should be taken not to apply the Bordeaux 

 mixture too late in the season. Early varieties should 

 have but one spraying with this mixture after the fruit 

 ff sets," and late varieties but two. Where additional 

 applications are needed, use the copper carbonate solution. 



