26 
The Colorado Experiment Station 
this the per cent, of increase assumed to be due to the favorable 
season, we still have 245.4 per cent, more berries from the sprayed 
than from the unsprayed canes, or 91.75 per cent, of the season's 
increase was the result of spraying. This represents an increase of 
375 crates per acre, which, at a net profit of 50 cents per crate, 
would amount to $178.50, and deducting from this the cost of 
spray material for one acre, $10.24, for the season, there would 
remain for the grower a net gain of $167.26 per acre. 
Whereas, under the present condition, the Fruit Growers’ 
Associations in northern Colorado in 1914 handled 16,670 crates 
of red raspberries, there is little reason why this could not be in¬ 
creased to 50,000 crates, if systematic spraying were to be adopted 
generally. 
ACKNOWLEDGMENT. 
I am indebted to Mr. W. O. Fletcher, manager of the Loveland 
Fruit Growers' Association, to Mr. G. V. Booth of the Longmont 
Association, and to Mr. L. H. Stanton of the Boulder Association, 
for the data relative to their respective associations. 
To Mr. A. H. Gifford of Loveland, I am indebted for the num¬ 
erous courtesies extended in connection with our spraying experi¬ 
ments which were carried out on his plantation. 
