UNITED STATES DEPARTMENT OF AGRICULTURE 

 BULLETIN No. 395 



Contribution from the Bureau of Plant Industry 

 WM. A. TAYLOR, Chief 



Washington, D. C. 



PROFESSIONAL PAPER 



January 18, 1917 



PEACH SCAB AND ITS CONTROL 



By 



G. W. KEITT, formerly Scientific Assistant 

 Fruit-Disease Investigations 



CONTENTS 



Introduction . . . . o . . 

 The Disease 



Geographic Distribution 



Economic Importance . 



Description 



Pathological Histology . 



Page 

 1 

 3 

 3 

 4 

 6 

 8 



Page 



The Causal Organism 11 



Life History of the Causal Organism in 



Relation to Pathogenesis 32 



Control Measures 46 



Summary 61 



Literature Cited . 64 



WASHINGTON 



GOVERNMENT PRINTING OFFICE 



1917 



