IV 



CONTENTS. 



VASCULAR DISEASES. 



Page. 



Wilt of Cucurbits 209 



Definition 209 



Host-plants 209 



Geographical Distribution 209 



Signs of the Disease 211 



Etiology 212 



Field, Hot-house and Laboratory Notes. ... 217 



Effect of Water on Wilt 284 



Varieties Attacked 284 



Morbid Anatomy 285 



The Parasite Bacillus tracheiphilus 286 



Resume of Salient Characters 294 



Treatment 295 



Pecuniary Losses 297 



History 298 



Literature 299 



Black Rot of Cruciferous Plants 300 



Definition 300 



Host-plants 300 



Geographical Distribution 300 



Signs of the Disease 301 



Etiology 304 



Morbid Anatomy 314 



The Parasite Bacterium campestre 316 



Resume of Salient Characters 327 



Page. 

 Black Rot of Cruciferous Plants Continued. 



Treatment 328 



Pecuniary Losses 330 



History 331 



Literature 333 



Yellow Disease of Hyacinths 335 



Definition 335 



Host-plants 335 



Geographical Distribution 335 



Signs of the Disease 335 



Etiology 336 



Varietal Resistance 337 



Table Showing Sensitive and Resistant Varie- 

 ties 339 



List of Hyacinth Varieties which have 

 entirely or nearly Disappeared in 

 Consequence of the Yellow Disease.. 341 



Morbid Anatomy 342 



The Parasite Bacterium hyacinthi 344 



Resume of Salient Characters 350 



Treatment 351 



Pecuniary Losses 352 



History 352 



Literature 353 



ERRATA. 



Page 8 line 20 read only. 



'33 i Metcalf. 



'56 4 1897. 



Plate 3 last line read See plate 4. 



