12 
Bulletin 105. 
Dominie, Jonathan and Ben Davis, while the Winesap appears to 
be most commonly affected in the seed cavity, as previously men- . 
tioned. Some of these varieties are among those which are re¬ 
ported as dropping their fruit badly in some seasons during June 
and July, but whether or no the fungus plays any part in this matter 
has not been determined. 
Among pears, the Keiffer is the only variety which has thus 
far shown any liability to attack from this fungus, although in the 
cases observed other varieties were growing in the same orchard. 
The extent of the injuries due to this Alternaria have not been 
estimated even approximately. It is apparently, however, not a 
destructive fungous disease, as compared with some which attack 
the apple and pear in more humid regions. It is doubtless capable 
of doing considerable damage, however, to the fruit of susceptible 
varieties, some of which have been reported as almost failing to 
bring their fruit to maturity. 
CONTROLLING THE DISEASE. 
In the absence of any experimental work in the control of the 
Alternaria rot the methods for combating the fungus are necessarily 
suggestive. Attempts to control the fungus in one orchard, by the 
use of Bordeaux mixture, indicate that it can be much reduced. 
Whenever this fungus becomes troublesome the following measure? 
are suggested: 
(a) Clean culture, thereby covering up in spring all diseased, 
fruit that is left on the ground under the trees besides keeping the trees in a 
state of good health. 
(b) The use of some fungicide as a spray, the first application being 
a strong copper sulphate solution, one pound to twenty-five gallons of watei, 
applied just before the buds open in spring. The standard Bordeaux mix¬ 
ture should be used after blossoming, making one or more applications dur¬ 
ing the growing season as may appear necessary. This may be used in con 
junction with the poison mixtures applied for the control of the codlin, 
moth, thus saving extra labor and time. 
(c) While it is very improbable that the disease will ever prov 
uncontrollable by the preceding means, should that occur, it would be ad 
visable to discontinue the growing of varieties, which are particularly sus 
ceptible 'to the attacks of this fungus. 
