LETTER OF TRANSMITTAL 



U. S. Department of Agriculture, 



Bureau of Plant Industry, 



Office of the Chief, 



Washington, D. C, December 15, 1909. 



Sir: I have the honor to transmit herewith a manuscript entitled 

 "The Control of Peach Brown-Rot and Scab," by Mr. W. M. Scott, 

 Pathologist in Charge of Orchard Spraying Experiments and Demon- 

 strations, and Mr. T. W. Ayres, Scientific Assistant, Fruit-Disease 

 Investigations, and recommend it for publication as a bulletin of the 

 special series of this Bureau. 



The summer spraying of peaches has for years been a puzzling 

 problem on account of the injury to the foliage resulting from the use 

 of various mixtures. After repeated trials a fungicide was found in 

 1907 in the form of self-boiled lime-sulphur which prevents diseases 

 without injury to the foliage. 



The experiments with this material were repeated on a larger scale 

 in 1908. During the past season (1909) the treatment was demon- 

 strated on a block of 5,000 trees and further details were worked out 

 by experiment. The present paper describes these demonstrations 

 and experiments and gives a summary of the three seasons' work, 

 with recommendations for the treatment of orchards. 

 Respectfully, 



B. T. Galloway, 



Chief of Bureau. 



Hon. James Wilson, 



Secretary of Agriculture. 



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