CONTENTS 



INTRODUCTION 



PAGE 



Amount and kind of knowledge required by practical men 

 Familiarity with names and habits of parasites Pre- 

 ventive measures Cures Rule-of-thumb methods of 

 doubtful value, ......... 1-3 



FUNGI 



Nature of fungi Saprophytes Parasites Mode of growth 

 of fungi Reproduction of fungi How parasitic fungi 

 infect their victims How the spores of fungi are dispersed 

 Modes of dissemination of disease that can be prevented 

 Danger connected with pruning Selection of shade 

 trees, 4-28 



LICHENES 



Nature of lichens Saprophytes or parasites ? 29 



ALGAE 



Nature of Algae, ......... 29 



MYXOGASTRES 



Nature of Myxogastres or ' Slime fungi ' Germination of 



spores Plasmodium stage, ... . < - "'* 29-30 



