DISEASES AND PESTS OF PLANTS. 71 



COMPARATIVE VALUES OF SPRAY OUTFITS. 



Tables showing comparative values of spray outfits are given below. These will 

 vary greatly according to the machine used, grower using it, age of trees, facilities 

 for mixing, topography of land, etc. They are given as a basis for figuring values, 

 and to show that the labour cost is the main item in spraying. The value of the 

 larger outfits, other than shown here, is that less time is taken in the application 

 of the spray, which is an important consideration, especially when fighting some of 

 the pests, less labour is required per acre sprayed, higher pressure is obtained, and, 

 as a general rule, more thorough spraying is accomplished. 



BASIS : 2.000 AND 10,000 GALLONS OF SPRAY. 



Ptm-er Outfit 



Initial cost .~ $450 00 



Number of gallons j)er day, 1,200. 



2,000 10,000 



Gals. Spray. Gals. Spray. 



Interest on investment at 8 per cent $ 30 00 $ 36 00 



Depreciation in value at 10 per cent 45 00 45 00 



One and two-third days, three men at $2.">0 ... 12 50 G2 50 



One and two-third days, team at $3.50 5 87 29 35 



Three gallons gasolene at 30 cents 90 4 50 



Total cost ....... ................... $100 27 $177 35 



Du/>1c.r 



Initial cost .............................................. $ 70 00 



Number of gallons per day, 600. 



2,000 10,000 



Gals. Spray. Gals. Spray. 



Interest on investment at 8 per cent .......... $ 5 60, $ 5 60 



Depreciation in value at 10 per cent .......... 700 700 



Three and one-third days, three men at $2.50 ... 25 00 12.~> 00 



Three and one-third days, team at $3.50 ....... 11 75 58 75 



Total cost $49 35 $196 35 



BASIS : 15,000 GALLONS SPRAY. 



Power outfit $225 00 



Duplex hand-pump 288 00 



COST OF LABOUR PER GALLON TO SPRAY IN LARGE OKANAGAN ORCHARD. 



Two men and team with power outfit spray out 1,000 gallons per day. 



Two men at $2 $4 00 



Team at $2.50 2 50 



$6 50 



Cents per gallon for labour 0.0065 



In this case only two men are used to do all the work, and the teamster is done 

 away with. Under a great many conditions the work can be done cheaper than this. 

 In this instance water was not very handy to some parts of the orchard, and no 

 supply-tank was used. 



