Diseases of the Rose. 123 



for a few hours twice a week. The only precaution is 

 to use no more heat than is sufficient to boil the 

 sulphur, for should it catch fire it would damage the 

 plants." 



Mr. Sewall Fischer recommends the use of hyposul- 

 phite of soda, in the proportion of half an ounce to a 

 gallon of water. 



■ Still another formula, from Mr. R. S. Halliday, is as 

 follows : 



"I would recommend the use of sulphuret of potassi- 

 um in place of flour of sulphur, in the proportion of 

 two ounces to twenty-four gallons of water. Syringe 

 with the mixture once in two weeks, or oftener if you 

 see any signs of the fungus appearing. 1 have also 

 found it a remedy for black spot." 



Dry sulphur applied directly to the foliage by means 

 of a bellows or by beating it from a cheese cloth bag, is 

 also used by many, and after applying, the house is 

 kept closed for an hour and the temperature allowed 

 to rise to about 100°. 



One objection to the various washes lies in the fact that 

 if used too strong, they will cause the foliage to drop, 

 while in plants badly affected, the wash needs to be used 

 thoroughly, and this necessitates incurring some risk. 

 If sulphur is used in the dry state and care is not taken 

 to distribute evenly and in small quantity, the result . 

 sought will not be accomplished, more will be required, 

 which the subsequent syringing will carry to the soil. 



