CONTENTS 



PAGE 



Host considerations ; 381 



The disease .381 



Names 381 



Historical 381 



Geographical distribution 382 



Economic importance 383 



Symptoms ' 384 



On the leaves 384 



On the twigs 393 



On the fruit 394 



Etiology : 394 



Historical 394 



Nomenclature 395 



Pathogenicity 396 



Morphology 398 



Cultural characters 399 



Life history 413 



Inoculation 413 



Incubation 418 



Infection 419 



Effect of environmental factors 421 



Varietal susceptibihty 422 



Control ■ 427 



Exclusion 427 



Eradication 428 



Protection 429 



Spraying 429 



Cultivation 431 



Immunization 434 



Recommendations for control 434 



Literature cited 435 



377 



