The Colorado Experiment Station 
quired for one acre, would amount to $2.56. If four treatments 
are given during the season, three before picking at intervals of 
two weeks, and one immediately afterwards, the cost per acre for 
the season would be $10.24, an amount offset by eight or ten crates 
of berries; if the yield cannot be increased more than ten crates per 
acre by spraying, one would certainly be justified in the position 
that “the game is not worth the candle.” 
By giving three applications of Bordeaux mixture as men¬ 
tioned above, we have reduced the number of diseased canes and the 
extent of the infections on these canes to less than seven per cent., 
and had we been able to carry out four sprayings as was our pur¬ 
pose, we have reason to believe that the injury could have been 
reduced to practically zero. 
R esults of Sp raying. 
A comparison of Figures 12 and 13 with Fig. 10 suggests a 
very plausible and satisfactory explanation of the increased yield on 
the part of the sprayed canes. All of the canes shown in these 
illustrations are cut close to the ground; those in Figs. 12 and 13 
threw out strong, vigorous fruit spurs 16 to 18 inches long, all the 
way to the ground; those in Fig. 10 have practically no spurs within 
18 to 24 inches of the ground; the former were sprayed, the latter 
were not, and it is obvious that the canes with the larger number 
of spurs will produce more fruit than the naked ones. By an 
actual count of the fruit spurs on the lower 24 inches of 100 sprayed 
canes, the average number was found to be 9.82, while on a like 
number of unsprayed canes, there was but 3.55 to the first 24 inches. 
Again, 65 per cent, of the sprayed canes had their lowest fruit spur 
within 6 inches of the ground, 32 per cent, from 6 to 12 inches, and 
3 per cent, above 12 inches; with the unsprayed canes 37 per cent, 
had the first spur within 6 inches of the ground, 41 per cent, from 
6 to 12 inches, and 22 per cent, above 12 inches. 
In Figs. 14 and 15 are shown sprayed and unsprayed canes, 
respectively, in the spring condition just as they are leafing out. 
The sprayed canes with their numerous leaves present an entirely 
different picture from the naked, spindling ones which were 
unsprayed. 
Below are given the actual returns from an experimental 
patch which was sprayed three times: 
Mr. A. H. Gifford, Loveland, Colo.— 1 j/2 acres. 
Crop of 1912—Unsprayed canes.200 crates 
1913— Unsprayed canes.200 crates 
1914— Sprayed canes...735 crates 
Increase in yield for 1914 over 1913.535 crates 
Gain per cent, for 1914.....267.5% 
