CONTENTS Continued. 



PAGE. 

 MISCELLANEOUS AND LESS PROMINENT VARIETIES Continued. 



Mayette Blanc 336 



Mayette Rouge 316 



Mesange 316 



Meylan 316 



Monstreuse 316 



Neff (Ncff's Prolific) 316 



Paper Shell 317 



Parisienne 317 



Persian. See Kaghazi 317 



Powell. See Mayette 317 



Pride of Ventura 317 



Proeparturiens 318 



Santa Barbara Soft Shell 318 



Santa Rosa 318 



Seedling. See Santa Barbara Soft Shell 318 



Serotina . 318 



Soft Shell. See Santa Barbara Soft Shell 318 



Treyve 318 



Tribble. See Mayette 319 



Vourey 319 



Wagner - 319 



Willson (Willson's Wonder) 319 



DISEASES AFFECTING THE WALNUT 320 



WALNUT BLIGHT OR BACTERIOSIS 320 



Host 320 



Popular Name of Disease 321 



Geographical Distribution . 321 



History of Disease in California 322 



Losses from Blight = 323 



Earlier Studies 324 



Cause of Disease 325 



Confusion with Marsonia juglandis 325 



Characteristics of Bacteriosis 328 



On Branches 328 



Bacteriosis is not Die-Back 329 



On Nursery Trees 329 



Leaves 329 



Catkins 329 



Nuts 329 



Blossom End Infection 332 



Lateral Nut Infection 333 



Late Infections - 333 



White Deposit on Diseased Tissue 335 



Winter Habitat of Germ 335 



Secondary Infection 337 



Effect of Climate 337 



Fogs and Moisture 338 



Insects 338 



How the Germ Enters the Tissue 339 



Two Seasons Compared 339 



Non-blighting of Late-Blooming Trees 341 



Immunity 342 



Isolation 342 



A MORE TECHNICAL STUDY OF THE WALNUT ORGANISM 343 



Pseudomonas juglandis Pierce 343 



Morphology 343 



Cultural Characteristics _ 344 



