CONTENTS 



PAGE 



The host plants 315 



Varietal susceptibility 310 



The disease 316 



Names 316 



History and distribution 317 



I !c roomie importance 318 



319 



On the bulbs 319 



On the leaves 323 



On the flowers 326 



On the stalks 328 



■■: 328 



nenclature 328 



Morphology 332 



siology 335 



Growth 335 



( ionidia product ion 338 



I )] (seminal ion of conidia : 339 



Pathogenicity 339 



Experimental methods 340 



Results of inoculations 342 



Discussion of parasil ism 349 



Life history 350 



Primary inoculation and infection 350 



Secondary inoculations and infection 350 



Pathological histology 351 



Control 355 



Summary 357 



Bibliography 359 



311 



