84 THE BOOK OF THE CARNATION 



has been introduced on plants from the South, it seems 

 to naturally disappear, and, in any case, by removing the 

 affected parts of the foliage it is certain to be stamped out 

 without further trouble. The appearance of this pest is 

 so characteristic that there is no mistaking it for anything 

 else. Its appearance is heralded by a blister-like spot, 

 which is followed by a dark-brown snuff-like production, 

 which is the fungus in its perfected condition. At this 

 stage the spores spread over the foliage of other plants, and 

 gain a footing so rapidly that it is impossible to check it 

 with any degree of certainty, and in bad attacks it is 

 generally conceded that the best plan is to burn the 

 plants, and so get rid of all disease and start afresh with a 

 clean batch. Removal of the portions of foliage affected 

 and repeated washings with some anti-fungoid wash, with 

 Bordeaux mixture, or, preferably, with ammoniacal copper 

 carbonate solution sprayed, are means that may be taken 

 to repress and prevent the spread of this disease. Sufficient 

 of the last-named to make fifty gallons of spraying material 

 is composed as follows : To five ounces copper car- 

 bonate, add sufficient water to form a thick paste. Add 

 three pints ammonia to dissolve the copper, and preserve 

 the mixture in air-tight bottles. For spraying, add one 

 part to a hundred parts of water. The Gardener gives 

 this formula 



Water, 9 gallons. 



Strong (26 degrees) Aqua Ammonia, 15 fluid ozs. 



Copper Carbonate, i J oz. 



The copper carbonate is first made into a thin paste 

 by adding eight and three-quarter fluid ounces of water. 

 The ammonia water is then slowly added, and when 

 all the copper carbonate is dissolved a clear, deep blue 

 solution is obtained, which does not become clouded 

 when diluted to nine gallons. 



Prevention is undoubtedly largely possible if the plants, 



