12 LIME-SULPHUR MIXTURES FOR SUMMER SPRAYING. 
and the second midway between. Scab infections begin to take 
place four to six weeks after the trees bloom, and in order to control 
this disease the first treatment must be made not later than a month 
after the petals drop. The time of the last application must be 
determined by the ripening date of the variety. A month before 
the fruit ripens is about as late as it is safe to spray the trees, owing 
to the danger of staining the fruit, though a later treatment would 
often be more effective against brown-rot. Three applications dis- 
tributed in this manner are sufficient for the Elberta and earlier 
varieties. A fourth treatment will doubtless often be desirable for 
later maturing varieties. 
The results of the past two years’ experiments are fairly good, 
and there seems to be no question as to the advisability of spraying 
the peach orchard where brown-rot and scab are troublesome, but 
many disappointments are naturally to be expected. The curculio 
and other insects readily break the skin of the peach and admit the 
brown-rot fungus even through a coating of the spray mixture, so- 
that a certain amount of rot may always be expected when the con- 
ditions are favorable. 
CHERRY LEAF-SPOT EXPERIMENTS. 
As previously stated, cherry trees had been planted with peaches 
and apples in the orchard of Mr. H. A. Aldrich, at Neoga, Ill., and 
these were included in the experiment. Mr. Aldrich informed the 
writer that his cherry trees had been defoliated every year for sev- 
eral years and that he had practically lost two of his varieties—the 
Wragg and the Ostheimer. This trouble proved to be due to the 
cherry leaf-spot (Cylindrosporium padi Karst.), which is common 
throughout the Middle West, often causing complete defoliation of 
cherry trees. The English Morello has been abandoned in many 
sections on account of this disease. | 
The Montmorency, Dyehouse, Early Richmond, Wragg, and 
Ostheimer varieties were included in each plot of the experiment. 
Many trees of the last two varieties had died, and the others were 
mostly stunted and sickly. All the plots were sprayed on the same 
dates, viz, May 20, June 20, and July 17. The first date was about 
a month after the trees bloomed and the second immediately after 
the crop was picked. This application was purposely delayed to 
allow the fruit to ripen so as to avoid staining it. Some infections 
had already taken place when the first application was made, but 
not enough to seriously interfere with the experiment. A few leaves 
of the Ostheimer variety were showing numerous spots of the dis- 
ease, and traces of it could be detected on all varieties. | 
[Cir. 27] 
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