100 BOARD OF AGRICULTURE. [Pub. Doc. 



It costs proportionately less to spray ten acres than one 

 acre, owing to the fact that it pays to buy lime by the barrel, 

 and one barrel will serve for nuich more than ten acres. 

 Taking the Vermont results from one acre as a basis, the 

 gross profit on ten acres, at 70 cents per bushel, would be 

 $791. The cost of spraying, including the necessary outfit, 

 would be about $41, leaving a net profit of $747. 



A year or two ago I compiled, from various authentic 

 sources, the possible profits from the spraying of an apple 

 orchard. The orchard was supposed to contain 200 trees, 

 of which 190 were sprayed and the remainder left untreated, 

 as a check. From the results of actual experiments the yield 

 of fruit from the ten unsprayed trees w^as calculated as 

 follows : — 



First quality, 20 bushels, at $2.25 per barrel, . . . . |1G 80 

 Second quality, 22 bushels, at $1.75 per barrel, . . . . 14 40 

 Third quality, 24 bushels, at $0.10 per barrel, .... 90 



Total, $32 10 



Ten of the sprayed trees gave the following yield : — 



First quality, 110 bushels, at $2.25 per barrel, . . . . $79 80 

 Second quality, 20 bushels, at $1.75 per barrel, . . . . 12 60 

 Third quality, 5 bushels, at $0.10 per barrel, .... 20 



Total, $92 60 



On this basis the value of the crop from 190 sprayed trees 

 would be $1,759.40 ; from a like number of unsprayed trees, 

 $609.90; leaving a balance of $1,149.50 in favor of the 

 sprayed trees. 



Now as to the cost. I allowed in this case for the cost of 

 the outfit ; for the cleaning up of the orchard in the spring ; 

 for one winter treatment with the simple solution of copper 

 sulphate, one pound to twenty-five gallons of water ; for one 

 early spraying with strong Bordeaux mixture, containing 

 five pounds each of copper sulphate and lime to fifty gallons 

 of Avater; for three subsequent treatments with the same 

 mixture, to which Paris green was added at the rate of one- 

 half pound to each barrel; and, finally, for one late treat- 

 ment with half-strength Bordeaux. The items are as follows 

 for 190 trees : — 



