36 



In usin^ the solution recommended for the apple scab, it 

 may be well to remind those not familiar with the ingre- 

 dients that owing to its corrosive nature it will be necessary 

 to wash the pumps with clear water immediately after using. 



A series of experiments were also conducted at the 

 Central Experimental Farm, Ottawa, and the results given 

 in the report for 1890. Below are a few of the results: 



The trees were of the Fameuse variety, planted fourteen 

 years' ago on loose, gravelly soil. During the past four years 

 these trfc",s had not yielded more than 25 per cent, of first- 

 class apples. , 



Treated with : 



Copper Carbonate i}4 oz. 



Ammonia i qt. 



Water 22 gal. 



Result : — 



No. I apples 33 per cent. 



No. 2 25 " 



No. 3 42 " 



Row 2. Treated with : 



Copper Carbonate 3 oz. 



Water 22 gal. 



Result : — 



No. I 50 per cent. 



No. 2 25 " 



No. 3 25 " 



As t.he cost of the application is much increased by the 

 addition of ammonia, while the results cited above do not 

 seem to warrant its use, it would appear that the copper 

 carbonate and water mixture in the strength as applied 

 above could be used to advantage, and at a cost of about 

 one cent per tree each application, or five cents for the 

 season. This is an outside estimate even for large trees. 

 It may be mentioned that the older leaves appear to 

 be more sensitive to injury from most fungicides and 

 insecticides than the young and growing leaves. 



A COMBINED FUNGICIDE AND INSECTICIDE. 



At the Central Farm, Ottawa, a series of experiments 

 were conducted, after which the following were recom- 

 mended for crial : 



(a) Carbonate of copper i >^ oz. 



Ammonia i}4 pts. 



Water.. 25 gals. 



Paris green i >^ oz. 



The carbonate of copper should be dissolved in the 

 ammonia, then mixed with the water, and the Paris green 



