CONTENTS 



Introduction, 

 Historical summary, 

 Names, .... 



Description of the mosaic disease of tobacco, 

 Occurrence, .... 

 Economic importance, 

 Infectious nature of the disease. 

 Contagious nature of the disease. 

 Pathological anatomy, 



Leaves, .... 



Stems, .... 



Roots, .... 

 Fungi and the mosaic disease, . 

 Bacteria and the mosaic disease, 

 Dissemination agents. 



Insects, .... 



Workmen, 



Seed 



Fertilization in relation to mosaic disease 

 Effect of colored light on mosaic disease. 



Experimental data, . 

 Biochemical studies. 



Enzyme activities in healthy and diseased plants. 



Reaction of mosaic sap with various substances. 



Probable character of the causal agent, 

 Prevention and control, ..... 

 Summary, ....... 



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Publication of this Document 



approved by the 

 Supervisor of Administration. 



