Ammoniacal Carbonate of Copper, prepared by mixing 

 I oz. of carbonate of copper with 5 ozs. of carbonate of 

 ammonia, and dissolving the mixture in 1 quart of hot water. 

 When thoroughly dissolved, 16 gals, of cold water are 

 added. This solution is a clear liqutd and can be used in 

 place of Bordeaux mixture in private or public parks, 

 conservatories, &c, where appearances have to be con- 

 sidered. 



Quicklime is used for sterilising the soil, especially during 

 attacks from root fungi. 



Carbon Bisulphide ', has proved itself a very effective soil 

 steriliser. It is being extensively used in Germany and in 

 other parts of Europe at the present time ; the difficulties 

 connected with its transport by water over long distances 

 have prevented its use in most of the Colonies ; but when 

 these difficulties are overcome it will no doubt be generally 

 used for treatment of fungi which inhabit the soil. 



There are other fungicides which are more or less in 

 general use, such as iron sulphate, Condy's fluid (potassium 

 permanganate), formalin and paraffin, while others are used 

 in special cases. 



iv. The isolation of a diseased area, which is effected 

 by surrounding that area with a trench six inches wide 

 and of depth varying according to the distance below 

 the surface to which the fungus can spread, is in general 

 use for the treatment of root fungi. 



v. A rotation of crops, which consists in growing for 

 a certain period on the soil one or more crops which are 

 immune to the fungus present in the soil, resolves itself 

 into an attempt to " starve out " the fungus, and, when 

 properly applied, is an effective method for treatment of 

 root diseases. 



vi. The sealing of all wounds which are made 

 during pruning or through other causes should always 

 be practised. The wounds are best sealed with a mixture 

 of coal tar and clay made in such proportions as to form 

 a thick paste, and applied by means of a brush. This 

 practice, accompanied by the production of a vigorous 

 growth on the part of the plant, is effective in preventing 

 attacks from wound parasites. 



vii. The selection and propagation of immune 

 varieties and the production of resistant varieties by 

 hybridisation constitutes a highly scientific method which 

 has given good results. 



In the above the more general methods which are in use 

 for the treatment of fungus diseases have been enumerated. 

 The work of plant pathologists is continually providing 



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