Experiments in Preventing Pear Scab. 
Some experiments in 1893, in treating pear trees for the pre- 
vention of the pear scab and the cracking of the fruit, were very — 
successful in accomplishing the desired objects. The plan of the 
experiments was: 
1. To test the efficacy of dilute Bordeaux mixture against pear 
scab. 
2. To compare the efficacy of three sprayings before the blos- _ 
soms open with two sprayings before the blossoms open. 
The Horticulturist* called attention a year ago to the discovery 
by Fairchild of the fact that pear scab appears on the new growth 
before the blossoms open, and that subsequently his own investi- 
gations showed the same was also true of the nearly related fun- 
gus causing the applescab. A knowledge of these facts modified 
somewhat pre-existing opinions as to the importance of spray- 
ing before the blossoms open and led to the belief that the treat- 
ment of either pears or apples for the prevention of the scab 
would be more successful if more attention were given to spray- 
ing the trees thoroughly after the buds opened, but before the 
blossoms unfolded. The experiments with pears in 1893 were, 
therefore, so planned as to test not only the efficacy of spraying 
before the blossoms opened, but also to test the value of three 

treatments before blooming, compared with two treatments before ~ 
blooming. 
In the above mentioned paper on “ Latest Results in Spraying 
for Apple Scab,” it was shown that the leading investigators of 
the United States and Canada were almost unanimous in their 
verdict for the Bordeaux mixture as being, on the whole, the 
most satisfactory fungicide yet tested for the apple scab and many 
of them made special mention of dilute Bordeaux mixture as 
being most desirable for this purpose. The fungus which causes 
pear scab, though not identical with the fungus which causes apple 
* Beach, 8. A., ‘‘ Latest Results in Spraying for Apple Scab.”” Proc. Western 
N. Y. Hort. Soc’y, 1893, pp. 69-72, also pp. 504-8 of Trans. N. Y. State Ag’) 
Soc’y, 1892. 
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