Maryan Makram Youssef Saad <br/><br/>
Pathological studies on ralstonia solanacearum the causal agent of potato brown rot /  
 دراسات مرضيه على الميكروب ralstonia solanacearum مسبب العفن البنى فى البطاطس 
Maryan Makram Youssef Saad ; Supervised Maurice Sabry Mikhail , Ahmed Ismail Abdelalim , Maggie Elsaid Mohamed 
 - Cairo :   Maryan Makram Youssef Saad ,   2011 
 - 144 P. :   charts , facsimiles ;   25cm 
<br/><br/>Thesis (M.Sc.) - Cairo University - Faculty of Agriculture - Department of Plant Pathology and Physiology 
<br/><br/> The present work was performed to characterize the genetic variation between virulent and non- virulent phenotypic conversion type variant (PC- type variant) isolates of ralstonia solanacearum race 3 (biovar2) the causal agent of potato brown rot . Nine isolates were isolated from different habitats (potato tubers weeds soil and irrigation water)  
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<br/><br/><label>Subjects--Index Terms: </label>Phenotypic conversion  Ralstonia solanacearum   Virulent