11 



Unsprayed. Sprayed. 



Practically free from scab 29 per cent. 65 per cent. 



Slightly scabbed 48 " 24 " 



Badly " 23 " 11 " 



The Bordeaux mixture used in this case was made accord- 

 ing to the original formula — 6 lbs. blue vitriol and 4 lbs. 

 lime to 22 gallons of water. This has been found to be 

 much stronger than is necessary. Also, four sprayings will 

 usually be found sufficient. 



The same season a Flemish Beauty pear tree was sprayed 

 with Bordeaux mixture on June i, 8, 16, 29, July 9, and 

 August 5. Another tree was left unsprayed as a check. 

 The pears were gathered September 21, and showed the 

 following : 



Unsprayed. Sprayed. 



1st quality 5 per cent. 70 per cent 



2d " 12 " 28 '• 



3d " S3 " 2 " 



In this case the Bordeaux contained one pound of blue 

 vitriol to eight gallons of water. For the last spraying, 

 August 5, the solution of copper carbonate was used instead. 

 Here, also, four sprayings would probably have answered. 



The following experiments were made in 1893 in orchards 

 at Durham and Dover : 



In one orchard five Sheldon pear trees were sprayed May 

 15, just before the blossoms opened; June i, just after the 

 blossoms had fallen ; and on June 16 and 28. On two of 

 the trees Bordeaux mixture, of the strength of i lb. each 

 blue vitriol and lime to 8 gallons of water, was used ; on the 

 others, of the strength of i to 12. However, owing to an 

 oversight, the pears when gathered were not kept separate, 

 so that the comparative effect of the two strengths could not 

 be determined. Two trees were left unsprayed as checks. 



When the pears were gathered they were examined and 

 counted with the following result : 



Unsprayed. Sprayed. 



1st quality 3 per cent. 58 per cent. 



2d ■' 35 " 30 " 



3d " . 62 " 12 " 



