62 



FUNGOUS DISEASES AND SPRAYING 



to it. Dropping of the leaves apparently from this cause were 

 reported in several instances. 



Treatment. We have none to recommend at present, as 

 spraying with Bordeaux mixture has seemed to have but little 

 effect in preventing it. 



The results o;iven above are on the basis of the effect of the 

 spraying on the fungus. The following results are from some 

 of the same apples but on a commercial basis : 



I. 



II. 



III. 



IV. 



The cost of spraying apple tr 

 mixture is from 10 to 15 cents 



ees three times with Bordeaux 

 3er tree. The profit or loss by 



the operation will depend upon a number of conditions, more 

 particularly : variety, prevalence of disease, quantity and value 

 of apples produced. 



If we assume that Baldwin trees produce 3 barrels each, 

 that it costs 12 cents apiece to spray them, and that the apples 

 are worth for firsts, seconds, and thirds (without barrels), 

 respectively, SI. 00, 50 cents, and 20 cents, the percentages 

 given above will give as net profit per tree of spraying : 

 I, 30 cents; II, 12 cents; III, 39 cents ; IV, 55 cents; the 

 average being 34 cents. 



BLACKBERRY 



Blackberry Rust. Affected plants have yellowish, sickly 

 appearance ; under side of leaves covered with bright orange 

 powdery spore patches. 



Treatment. Diseased plants should be dug up and destroyed 

 as soon as detected. 



