20 



A Conifer Disease. 



spread from stable manure, which had been imperfectly buried 

 in the soil. The projecting portions of straw were thickly 

 covered with the Botrytis. 



The Botrytis is very dependent on moisture and only produces 

 spores in a humid atmosphere, hence it is important that damp, 

 low-lying situations should be avoided for nursery purposes. 



When the disease is present, spraying with the following 

 solution, elsewhere called " Violet Mixture," will check its 

 progress : — 



Sulphate of copper ... ... ... 2 lb. 



Carbonate of copper ... ... ... 31b. 



Permanganate of potash ... ... 3 oz. 



;Soft soap ^lb. 



Rain water 18 galls. 



Every part of the ground within and for some distance beyond 

 the affected patch should be thoroughly wetted. The soft soap 

 should be dissolved in hot water. The remaining ingredients 

 are soluble in cold water. 

 All diseased seedlings should be collected and burned. 



Literature. 



1. Tubeuf, C, Beitrage zur Kenntniss der Baumkrankheiten, 

 p. 4 (1888). 



2. Tuzson, J., Ueber die Botrytis-Krankheit junger Nadel- 

 holzpflanzen {Botrytis cinerea, Pers.). Zeitschr. fiir Pflanzen- 

 krankheiten, XL, p. 95 (1901). 



3. Massee, G., A Conifer Disease, Gard. Chron. Feb. 17, 1900, 

 p. 101, Fig. 3L. 



4. Behrens, J., Phytopathologische Notizen, 1. Botrytis Doug- 

 lasii, Tub., Zeitschr. fiir Pflanzenkrankheiten, V., p. 36 (1895). 



5. Hartig, R., and Somerville, W., Text-Book of the Diseases 

 of Trees, p. 130, Fig. 71 (1894). 



6. Hartig, R, Lehrbuch der Pflanzenkrankheiten, p. 101, 

 Fig. 80 (1900). 



7. Tubeuf, C. and Smith, W. G., Diseases of Plants, Sec. 

 p. 269, Fig. 142 (1897). 



