TREATMENT 



Apple Scab, Grape and Gooseberry Mildew, 



1!V 



JOHN CRAIG. 

 Horticulturist of the Central Experimental Farm. 



The spread and development of the disease, known as "apple 

 scab" and "black spot" of the apple {Fusicladium dendriticxim 

 Fckl), has been so gradual, during the past ten or fifteen years, that 

 orcbardists do not at the present time fully grasp the magnitude of 

 the annual loss from this cause to the fruit interests of the Domin- 

 ion. While the prevalence of the malady is not always constant in 

 the same locality, yet it is spreading each year and extending its 

 ravages to varieties hitherto unaffected. It is true that many 

 varieties are comparatively exempt, yet we cannot expect " fungous 

 proof apples," except in a relative degree. 



This disease is not of recent introduction, nor is it confined to 

 America alone. It is severest in the northern and cooler regions ; 

 but as it is in these districts that the bulk of our apples is produced, 

 it becomes the more important that orchardists and fruit-growers 

 should look closel}'' into the subject of suitable remedies. 



3Iany orchards of Fameuse that ten years ago yielded 60 to 75 

 per cent, of first-class apples do not now give more than 25 or 3t» 

 per cent., and the remainder " seconds" or "thirds." 



The late Mr. Charles Gibb* stated to the Montreal Horticultural 

 Society that in his orchard, which was more completely exposed to 

 the prevailing winds, and in which the disease was more pronounced 

 than in any other orchard in that locality, the effect was so marked 

 that his apples brought an average of only 25 cents per bushel, or 



*KtiK)rt of Montreal Horticultural Society, 188G-87, pag^e 21. 



