158 CHRYSANTHEMUMS 



degrees at night or even lower when the 

 flowers are opening, the atmosphere must be 

 dry and the temperature lowered gradually 

 and there must be sufficient artificial heat 

 combined with ventilation to keep a reason- 

 ably free circulation of air through the house. 

 Sulphur dusted through the house during 

 the heat of the day, or a mixture of lime and 

 sulphur in the form of paste spread on the 

 heating pipes and sufficient heat applied to 

 disperse the fumes, will aid in preventing and 

 controlling the disease. If badly affected, 

 the plants may be sprayed with a solution of 

 liver of sulphur, one ounce to two gallons of 

 water, care being taken that none of the 

 solution comes in contact with opening 

 flowers. The only other liquid fungicide 

 that can be used without discolouring the 

 foliage is the ammoniacal copper carbonate 

 solution. This is prepared as follows, the 

 formula being that given in Lodeman's "The 

 Spraying of Plants": 



Copper carbonate 3 02. 



Ammonia (22 Beaum6) I qt 



Agitate until the copper is completely dissolved 



Use in proportion of one part to one hun- 

 dred parts water. Bordeaux mixture may 



