F. T. Brooks and M. A. Bailey 215 



Practical details in regard to the application of the methods here 

 mentioned are given in the leaflets of the Board of Agriculture and need 

 not be repeated here. It is admitted that hygienic measures of this 

 kind are troublesome to carry out but they are commercially profitable 

 and offer the only present means of successfully combating one of the 

 most menacing fruit diseases. 



It is likely that any measures which conduce to the general well- 

 being of the trees will tend to reduce the danger of this disease, but 

 these are not sufficient without the application of the means of control 

 outlined above. 



Fruit growers must be educated to look upon the fungus Stereum 

 jmrpiireum as a dangerous enemy wherever it occurs in the vicinity of 

 fruit plantations, and they must deal with it accordingly. 



REFERENCES. • 



1. Brooks, F. T. SUver-Ieaf disease, I. Journ. Agric. Sci. 1911. 



2. Silver-leaf disease, II. Journ. Agric. Sci. 1913. 



3. Silver-leaf disease. Journ. Board Agric. and Fish. 1913. 



4. Note onDr J. Smolak's paper "A contribution to our knowledge of Silver- 

 leaf disease." Ann. App. Biol. 1915. 



5. Gtjssow, H. T. Der Jlilchglanz der Obstbaume. Zeit. f. Pflanzenkrank: 1912. 



6. Hector, J. M. Silver-leaf disease. Bulletin XXIV. Univ. Coll. Reading. 



7. Percivai,, J. Silver-leaf disease. Journ. Linn. Soc. 1902. 



8. Pickering, S. U. Silver-leaf. Woburn Experimental Fruit Farm, Si.xth and 



Twelfth RepoHs. 1906 and 1910. 



9. Smolak, J. A contribution to oiu' knowledge of Silver-leaf disease. Ann. App. 



Biol. 1915. 



{Received March Wth, 1919.) 



