593 



EXPERIMENTAL FARMS 



5 GEORGE v., A. 1915 



lime-sulphur alone at this time. The injury on plots 20 and 22 was so marked, how- 

 ever, that this combination' is apparently' not advisable. 



It would appear that Nico soap, 1 pound to 30 gallons, or Black Leaf 40, 1 part to 

 1000 is effective in killing the insect touched by the spray. The soap-kerosene emul- 

 sion, it will be noticed, is as effective as the flour kerosene emulsion, and costs only half 

 as much. The latter, however, is much easier to make. The addition of soap to the 

 Black Leaf 40, on plots 7, 8, and 9 should have increased the effectiveness of the spray, 

 and that it did not may have been due to the possibility of more leaves being curled on 

 these plots, and the aphis protected from the spray. 



The Nico soap used was supplied by Blackie Bros., Halifax. The Black Leaf 40, 

 was purchased from the Kentucky Tobacco Product Co., Louisville, Kentucky. 



Experiment for Control of Apple Aphis . 



1 



2 

 3 

 4 

 5 

 6 

 7 

 8 

 9 



10 

 11 

 12 

 13 

 14 

 15 

 16 

 17 

 18 

 19 

 20 

 21 

 22 

 23 



Black Leaf 40, 5 oz. to 40 gal., 1 part to 1,280 



Nice Soap, 1 lb. to 40 gal 



Black Leaf 40, 5 oz. to 35 gal., 1 part to 1,120 



Nico Soap, lib. to 30 gal " 



Black Leaf 40, 8 oz. to 40 gal., 1 part to 800, 



Nico soap, 2 lbs. to 40 gal 



Black Leaf 40, 2| oz.; Nico soap 8 oz. to 40 gal 



Black Leaf 40, 5 oz.; Nico soap 16 oz. to 40 gal 



Black Leaf 40, 5 oz., common soap 16 oz. to 40 gal 



Common Soap 2 lb. to 30 gal 



Black Leaf 40, 5 oz., and lime sulphur to 40 gal., 1-008 s. g., slight injury 



Common soap, 2 lb. to 30 gal - 



Common soap, 2 lb. to 40 gal : 



Black Leaf, 40 5 oz. to 35 gal. and lime-sulphur 1-008 s.g., slight injury 



Black Leaf 40, 8 oz. to 40 gal. and lime-sulphur, 1-008 s.g., slight injury 



Nico soap, 1 lb. to 40 gal. and lime-sulphur, 1-008 s.g., slight injury 



Nico soap, 1 lb. to 40 gal. and lime-sulphur, 1-008 s.g., slight injury 



Nico soap, 1 lb. to 20 gal. and lime-sulphur, 1-008 s.g., slight injury 



Kerosene flour emulsion (10 lb. flour, kerosene oil 5 gal. to 40 gal. water), dight injury.. 



Flour emulsion as above and lime-sulphur, 1-008 s.g., badly injured 



Flour emulsion (5 lb. flour 2^ gal. kerosene) 40 gal. water, slight injury) 



Flour emulsion (5 lb. flour 2j gal. kerosene) and lime sulphur 1-007 s.g., badly injured. . 

 Soap emulsion f| lb. soap 2 gal. oil to 40 gal.,) slight injury 



COST OF DIFFERENT SPRAYS USED IN CONTROL OF APPLE APHIS. 



In the work of controlling apple aphis we have worked out the cost of the different 

 sprays used and have taken as a basis the cost per 40 gallons of dilute spray. The fol- 

 lowing table will show the difference in cost between the various sprays and combina- 

 tions used : — 



Materials. 



Black Leaf 40 



Black Leaf 40 , 



Black Leaf 40 



Nico soap 



Nico soap 



Nico soap 



Nico soap, 8 oz. and black Leaf, 40 



Nico Soap 1 lb. and Black Leaf, 40 



Black Leaf, 40, 5 oz. and common soap il4 oz. to 35 gallons. 



Common soap '4 lb. to 40 gallons 



Common soap J2 lb. to 30 gallons 



Common soap '2 lb. to 40 gallons 



Flour kerosene emulsion 5 gal. kerosene, 10 lb. flour to 40 gallons 



Flour kerosene emulsion 2j gal. kerosene 5 lb. flour to 40 gallons. . 



Soap kerosene emulsion |2 gal. kerosene § lb. soap to 30 gallons.... 



Dilution. 



5 oz. to 40 gallons. . . . 

 5 oz. to 35 gallons. . . . 

 8 oz. to 40 gallons. . . . 

 1 lb. to 40 gallons. . . . 



1 lb. to 30 gallons. . . . 



2 lb. to 40 gallons 



2-67 oz. to 40 gallons. 

 5 oz. to 40 gallons. 



Cost. 

 $ cts. 

 37 

 0-43 

 60 

 47i 

 63 

 0-95 

 0-44 

 84J 

 43 

 20 

 13 

 10 

 90 

 45 

 44 



Kextville. 



