142 
ensuing season than one which loses its foliage in midsummer. There 
is, however, a more important matter to consider in this connection, 
and that is the life of the tree itself. We know that in sections where 
the leaf-blight is severe a tree soon succumbs entirely to the disease. 
While we have no data bearing on the longevity of treated trees there 
is no room to doubt that they can at least be made to live their allotted 
time. 
TREATMENT OF PEAR SCAB.* 
These experiments were carried on in the same orchards and at the 
same time as those described in the preceding pages. Owing to the 
fact, however, that very little fruit set the work was far frcftn satisfac¬ 
tory. At the time of the first treatment the fruit was about half an 
inch in diameter and stood erect upon the pedicels. The Bordeaux 
mixture, ammoniacal solution, mixture No. 5, copper carbonate in sus¬ 
pension, and acetate of copper were used, an effort being made iu all 
cases to bring out, if possible, the relative value of the fungicides as 
preventives of the disease, the effect of early and late sprayings, the 
relative value of three and six treatments, and the cost of each appli¬ 
cation. Without going into the details of the work it may be said: 
I. That in no case were the sprayings made early enough, as scab 
spots had already appeared on the fruit when the first applications 
were made. It was clearly evident that one spraying should have been 
made when the flowers were beginning to open and another when the 
fruit was about the size of peas. 
II. There was no material difference so far as the amount of scab 
was concerned between the trees treated early and late and those which 
received three and six sprayings, respectively. By early here it must 
be borne in mind that we mean when the fruit was half an inch in di¬ 
ameter. 
III. The costs of the treatments were found to be practically the same 
as those for pear leaf-blight. When one intends to spray for leaf-blight 
it will be an easy matter to begin earlier and treat the scab at the same 
time. In spraying for both of these diseases it would be well to make 
the first application as described above for scab, then follow with addi¬ 
tional treatments at intervals of 12 or 15 days until six or seven in all 
have been made. In the present condition of our knowledge the Bor¬ 
deaux mixture is the preparation most to be relied upon as effective 
against both leaf-blight and scab, and at the same time not injurious to 
the fruit. Should early treatments alone bo made the case would be 
altered. 
* Fusicladiumpirinum, (Lib.) Fckl. 
