141 
copper carbonate in 22 gallons of water was applied on the same dates 
as 1V. Forty-three gallons of the solution were used, but after the first 
two applications, which seemed to have little effect, the strength was 
doubled. The total cost of the treatments with this preparation was 
13.3 cents per tree. 
Results .—The disease was in a measure prevented, but the difference 
betweeu the treated and untreated trees w as not worthy consideration. 
SUMMARY OF RESULTS. 
Before summing up the results it is proper to state that the season 
was one exceedingly unfavorable for such an experiment, as the disease 
# 
even on the untreated trees did comparatively little damage. We feel 
warranted, how ever, in drawing the following conclusions from the work. 
I. The relative value of the preparations used in treating leaf-blight 
stand in the order named: 
Bordeaux mixture. 
Ammoniacal solution. 
Copper acetate (3 ounces to G gallons). 
Mixture No. 5. 
Copper carbonate in suspension. 
The difference between the Bordeaux mixture and the ammoniacal 
solution is scarcely perceptible, and if the cost is considered the latter 
stands first. 
II. The best results at the least expense were obtained by the early 
treatments. It is w r ell to add here that we do not accept this evidence 
as conclusive; on the contrary, we are inclined to think that had the 
disease been severe three treatments would not have been sufficient to 
hold it in check. 
III. Early sprayings are unquestionably better than late ones. 
IV. The cost of the various treatments w ill, in a measure, depend on 
the kind of spraying apparatus used, the distance from places where 
chemicals may be obtained at wholesale rates, and skill of the operator. 
It may safely be put down that for orchards of one thousand or more 
dwarfs the cost for treating with the Bordeaux mixture need not ex¬ 
ceed 2 cents per tree for each application. For standards the cost will 
reach 3 cents or perhaps a little less. 
In treating with the ammoniacal solution, which is the only additional 
preparation worth considering in this connection, the cost for dwarfs 
will average in the neighborhood of 1J cents per tree and for standards 
2£ cents. 
From one season’s work it is of course impossible to draw any defi¬ 
nite conclusions as regards the direct benefit to the trees resulting from 
the treatment. It is reasonable to assume, however, that if the leaves 
on a tree, and especially a fruit tree, can be made to continue their 
normal work until frost, they will enable the tree to make a better 
growffh, set more fruit buds, and consequently bear more fruit the 
