CONTENTS 



PAGE 



STAINING METHODS 116 



CARE OF SPECIMENS 119 



PREPARATION OF ILLUSTRATIONS 120 



Photographs ... ....... 120 



Photomiciographs 123 



Lumiere Plates 126 



Planars. . 126 



Drawings 126 



Paintings . 129 



CARD CATALOGUES AND SYSTEMS OF FILING 130 



PART III 

 SYNOPSIS OF SELECTED DISEASES 



I. THE CUCURBIT WILT. 132 



Type. 132 



Cause Bacillus tracheiphilus EFS 132 



Technic. . . .135 



Determine . . 137 



For the Organism 137 



Morphology ..... 137 



Cultural characters 138 



Response to Non-nutritional Environment 139 



For the Disease . ... 139 



Signs. . . 139 



Histology. . . ..:... 139 



Variability ... 141 



Transmission 141 



Literature 145 



II. BLACK ROT OF CRUCIFERS 145 



Type. . .... 145 



Cause Bacterium campestre (Pammel) EFS 147 



Technic. .... 149 



Determine 154 



For the Organism 154 



Morphology 154 



Cultural Characters 155 



Response to Non-nutiitional Environment 155 



For the Disease . . . 156 



Signs. 156 



Histology ,- 156 



Variability 157 



Transmission 159 



Means of Prevention 159 



Literature 159 



III. STEWART'S DISEASE OF MAIZE. . 160 



Type. 160 



