590 



experime:s-tal farms 



5 GEORGE v., A. 1915 



Bridgetown by M. B. Davis, B.S.A., now assistant in Pomology to the Dominion 

 Horticulturist, Experimental Farm, Ottawa. 



For the purpose of explanation of the terms in the foUoAving tables a few words 

 are necessary. 



As there was a great difference in the degree of both scab and russet on. the fruit 

 in these experiments, three divisions were made in each, and we havfe -slightly, medium, 

 and badly scabbed, and slightly, medium, and badly russeted fruit recorded. 



All apples on which were found very minute scabs on the side, or with small scabs 

 at the calyx end, which did not materially affect the appearance of the fruit, were 

 classed as slightly scabbed, those apples having scabs which were easily noticeable and 

 which injured the appearance, but which did not cause cracking of the, fruit, were 

 classed as medium scabbed, while those apples which were cracked by the fungus, or 

 half or more covered with the scabs, were classed as badly scabbed. 



In rtisseting practically the same rule applied, and apples were classed as badly 

 russeted when cracked or much blackened, as medium russeted when slightly black- 

 ened or roughened, and as slightly riisseted when the russet was visible but not definite 

 enough to in any way affect the appearance or market value of the fruit. ' 



All scabby apples were graded in" these experiments as No. 3 and in our opinion 

 this is where they should be placed, but in ordinary packing the apples classed by us as 

 slightly scabbed would have for the most part graded as No. 1. This fact will make 

 our per cent of No. 1 and No. 2 fruit seem small and a comparison between our per 

 cents and those which are obtained where No. 1 and No. 2 do not embody only strictly 

 clean fruit will not be fair. 



Plan of Experiment, Berwick Orchard — Section A — Gravenstein. 



Plot 18 received no arsenate in the fifth application, and in plot 20 no arsenate of 

 lead was used in the fourth and fifth applications. Sherwin-Williams arsenate of lead 

 was used in all the other spray mixtures at the rate of 5 pounds to 100 gallons. The 

 Niagara brand lime snlphur was used. The spraying mixture tested 1-009 specific 

 gravity or approximately 1 gallon concentrated lime sulphur to 40 gallons water, 

 Bordeaux made according to the usual formula, 4 pounds copper sulphate, 4 pounds 

 lime, and 40 gallons water was used. 



Kentville. 



