276 MANUAL OF FRUIT DISEASES 



cankers from the larger limbs, and prune out affected limbs 

 of smaller size. The methods followed are described under 

 another heading (see page 52). In pruning, knock off the 

 hanging mummies. Bury the fallen mummies by plowing 

 to a depth of several inches; this should be done before the 

 blossoms open. The regular pruning operations assist to no 

 little degree in the control of the brown-rot. The removal of 

 limbs admits sunlight and air, thus allowing the susceptible 

 parts to dry off more quickly after rains. 



The fruit should be sprayed. This can be done without 

 fear of injury to the foliage by the use of self-boiled lime-sulfur 

 of the 8-8-50 formula (see page 438). For curculio, add 2 

 pounds of lead arsenate to 50 gallons of the fungicide. Never 

 use lime-sulfur solution as a summer spray, even at dilute 

 strengths, since a 1 to 300 dilution may seriously burn peach- 

 foliage. Spray : (1) about the time the blossoms fall ; (2) two 

 or three weeks later or about one month after the petals drop ; 

 (3) about one month before the fruit ripens. 



Limited experiments indicate that lime-sulfur solution 1-40 

 may be used safely and effectively before the blossom-buds 

 open. This application purposes to prevent bud-infection, and 

 is worthy of trial. 



REFERENCES 



Quaintance, A. L. The brown rot of peaches, plums and other fruits. 



Georgia Agr. Exp. Sta. Bui. 50 : 237-269. 1900. 

 Jehle, R. A. Peach cankers and their treatment. Cornell Univ. Agr. 



Exp. Sta. Circ. 26: 53-64. 1914. 

 Jehle, R. A. The brown rot canker of the peach. Phytopath. 3 : 105- 



110. 1913. 

 Smith, E. F. Peach rot and peach blight. Journ. Myc. 5: 123-134. 



1889. 

 Smith, E. F. Peach blight, Monilia fructigena. Journ. Myc. 7:36- 



38. 1891. 

 Norton, J. B. S. Sclerotinia fructigena. St. Louis Acad. Sci. Trans. 



12 : 91-97. 1902. 

 Scott, W. M., and Ayres, T. W. The control of peach brown-rot and 



scab. U. S. Agr. Dept. Plant Indus. Bur. Bui. 174 : 7-26. 1910. 



