754 



EXPERIMENTAL FARMS 



7 GEORGE V, A. 1917 



It will be noticed that injury to foliage resulted in the Bordeaux-lime-sulphur 

 plot where the regular 4-4-40 (4: pounds bluestone, 4 pounds lime, 40 gallons water) 

 strength was used, whereas where the 3-3-40 (3 pounds bluestone, 3 pounds lime, 40 

 gallons water) sti-ength was used no injury was noticeable. This injury occurred 

 after the lime-sulphur spray June 15 was applied. It would seem that the 3-3-40 

 Bordeaux for the first sprays followed by lime-sulphur will give satisfactory results. 



STRENGTH OF LIME-SULPHUR TO USE. 



Experiments were continued again this season to find out what strength of lime- 

 sulphur gives best scab control. The test was conducted on a Spy block of uniform 

 trees. It would appear from the results that. the various strengths used were equally 

 effective. Five pounds of arsenate of lead was used to each 100 gallons. The Grasselli 

 concentrated lime-sulphur was used which tested 1-300 specific gravity. The strength 

 of the different sprays used were as follows : 



1-014 specific gravity test^l gallon Concenti'ate to make 21 3-7 gallons. 

 1-009 " " " =1 " " " " 33 1-3 " 



1-008 " " " =1 " " " " 37-5 " 



1007 " " " =1 " " " " 42 6-7 " 



LIME-SULPHUR AXD P.\RIS GREEN. 



One plot of Kings at Berwick containing three trees, was sprayed four times with 

 lime-sulphur, sp. gr. 1-008 with 1^ pounds of Paris green per 100 gallons. These trees- 

 were sprayed on the same dates as the other King plots. The hand pump being used 

 at a pressure of 140 pounds. The amount of bloom was the same on these as adjoining 

 trees, but not only was the foliage badly injured and the trees practically defoliated 

 but the fruit clusters were so damaged that all the fruit dropped soon after blossoming 

 and not a single fruit developed. This expeiiment would show that Paris green cannot 

 be used in the lime-sulphur spray without causing very great injury to foliage and 

 possibly of an entire crop of fruit. 



Kentville. 



