PEACH DISEASES 297 
beneath the lesion, suggesting an attempt on the part of the 
affected cells to repair the injury. Some time during the grow- 
ing season the fungus infects the twigs, developing lesions as 
previously described. In these diseased areas the pathogene 
passes the winter. 
Control of peach-scab. 
In the early history of the disease, peach-scab was less amen- 
able to treatment than it now is, because of severe injury of 
fungicides to the foliage. With the development of self-boiled 
lime-sulfur it has become possible to control scab without 
injury to the fruit or foliage. Where scab alone is to be treated, 
use self-boiled lime-sulfur 8-8-50 as follows: (1) four to five 
weeks after the petals drop; (2) about three to four weeks 
later. The second application is usually unnecessary if the 
first is thorough. Use about one-half to one gallon on trees 
three to four years old, depending upon the type of nozzle. 
The cost of one application on four-year-old trees has been esti-_ 
mated at four cents a tree. Spraying as directed above has 
been known to give from 92% to 99 per cent of the crop free from 
scab. 
Most peach-orchards in eastern United States should be 
given treatment for brown-rot as well as for scab. It should 
be remembered that preventing scab is an important step in 
the control of brown-rot. 
REFERENCES 
Whitmarsh, R. D. Black spot or scab (Cladosporium carpophyllum 
Thiim.). Massachusetts Agr. Exp. Sta. Rept. 23: 165-167. 
1911. . 
Sturgis, W. C. Scab and mold of peaches. Connecticut Agr. Exp. 
Sta. Rept. 18: 138-139. 1895. 
Sturgis, W. C. On the probable winter-condition of the fungus of 
peach-seab. Connecticut Agr. Exp. Sta. Rept. 20: 269-271. 
1897. 
Chester, F. D. The spotting of peaches. Delaware Agr. Exp. Sta. 
Rept. 8: 60-63. 1896. 
