84 



urseiiites is used it is advised that they be purchased in lOO-pound 

 lots, using 600 gallons of spraying .solution as a basis. Taking the 

 prices of these different compounds as they are in the Far West, the 

 following estimates are made: 



Paris green : 



Paris green, 4 |)onii(ls, at 25 cents $1 . 00 



I^nie, 8 pounds .04 



Total 1 . 04 



Scheele's green: 



Sfheele's green, 4 pounds, ut \2l cents 50 



Lime, 8 pounds 04 



Total 54 



Lime arsenite: 



White arsenic, li pounds, at 10 cents 15 



Lime, 8 pounds 015 



Additional lime, 12 pounds 06 



Total 225 



Lime arsenite with soda: 



White arsenic, 1 J pounds, at 10 cents .15 



Salsoda, 6 pounds, at 1 J cents .09 



Additional lime, (3 pounds 03 



Total 27 



Lead arsenate: 



Arsenate of soda, 2^ pounds, at 10 cents 25 



Acetate of lead, (i pounds, at 12 cents 72 



Total 97 



Prei)ared lead arsenate, 3(i jwunds, at 20 cents 7. 20 



From the foregoing quotations, any fruit grower can estimate the 

 expense of spraying by changing the prices to those prevailing in his 

 vicinity. The prices of these chemicals, excepting the lime and sal 

 soda, are from about ^ to 5 cents per pound more in the West than in 

 the East. The labor of preparing, which is but little, is another factor 

 which must be included. In the preparation of arsenicals for a home 

 orchard or a small commercial orchard it may l)e advisa])le for the 

 fruit grower to purchase the more easih' prepared compounds, such 

 as Paris green or prepared lead arsenate, as this does away with much 

 trouble and loss of time in preparing the solution. 



Labor is the principal clement of cost in actual spraying operations. 

 The cost of one spra3'ing for a thousand 8-vear-old trees in the far 

 West, using 2^ gallons of lime arsenite and soda compound per tree, 

 is estimated as follows: 



