DIVISION OF EORTICULTURE 



747 



SESSIONAL PAPER No. 16 



DIFFERENT QUANTITIES OF SOLUBLE SULPHUR. 



lu order to find out .whether a strength of soluble sulphur greater than that advised, 

 which is li pounds to 100 gallons, will give a better control of scab, or increase the 

 foliage injury, a series of t.ests were made at Berwick on Gravenstein, and at Falmouth 

 on Gravenstein, Spy and Golden Eusset. Five pounds of arsenate of lead was used per 

 100 gallons in each spray. The sprays were applied at the same date under uniform 

 conditions. 



It will be noticed that the fungicidal value of the spray was not materially 

 increased by a strength greater than that recommended and that the stronger sprays 

 are likely to cause increased foliage injury. 



Spray used at Berwick on Gravenstein. 



Per cent 

 Scab. 



Soluble sulphur 1| lbs., Barium chloride 5 lb. to 100 gals , 



2 " " 5 " 100 " , 

 " 2i " " i " 100 " . 



3 « « 4 « 100 " 



No spray 



47-6 

 84-2 

 42-2 

 49 2 

 73-4 



Spray used at Falmouth. 



Gravenstein Soluble sulphur 1| lbs. to 100 gals , 



Northern Spy " H " 100 " 



Golden Russet " 1| .". 100 " 



Average of three varieties , 



Gravenstein Soluble sulphur 2 lbs. to 100 gals , 



Northern Spy " 2 " 100 " 



Golden Russet " 2 " 100 " 



Average of three varieties 



Gravenstein Soluble sulphur 2^ lbs. to 100 gals 



Northern Spy " 2i " 100 " 



Golden Russet " 2^ " 100 " 



Average of three varieties 



G ravenstein No spray , 



Northern Spy " » 



Golden Russet " • 



Average of three varieties 



Gravenstein Soluble sulphur H lbs., BaCL2 5 lb. to 100 gals. 



Northern Spy " H " " h " 100 " . 



Golden Russet " H " " | " 100 " 



Average of three varieties 



Gravenstein Soluble sulphur 2 lbs., BaCL2 3 lb. to 100 gals. 



Northern Spy " 2 " " ^ " 100 " . 



Golden Russet " 2 " " i " 100 " 



Average of three varieties 



Gravenstein Soluble sulphur 2^ lbs., BaCL2 5 lb. to 100 gals. 



Northern Spy^ . 

 Golden Russet. 



Average of three varieties. 



100 

 100 



6 







8 



5 



4 



2 



4 



3 



6 



2 



4 



4 



43 



51 



34 



42 



6 

 4 

 4 

 9 

 6 

 9 

 4 

 12 

 8 



EXPERI.MENTS WITH BARIUM CHLORIDE ADDED TO SOLUBLE SULPHUR TO LESSEN FOLIAGE 



INJURY. 



When the foliage injury resulting from the use of soluble sulphur in the orchard 

 experiments in 1914 was reported to the agent for the soluble sulphur compound we 

 were told that it had been used too strong. The directions given on the container 

 were followed in our 1914 tests. These directions, I may say were considerably 

 modified on containers of this product put out later. It was also suggested that 

 barium chloride added to the soluble sulphur arsenate spray at the rate of one-half 

 pound to 100 gallons would entirely eliminate the burning of the foliage. The 



Kentville. 



