lONTKNTS 



Liming .... 



Hasio fortili/crs . 



Soil drainage 



Croj) rotation 



Eradication of wild host 

 Resistant varieties of erucifers 



Nature of suseeptibilitv and resistance . 

 Gcograpliical distril)iition of club root and bibliog 

 Powdery scab of potatoes 

 Significance of disease . 

 Predisposing factors 



Symptoms 



Cellular relations between host 

 Control 



Sanitary practices 



Seed tuber disinfection . 



Soil disinfection . 



Effects of fertilizers . 



Resistant varieties 

 Distribution and bibliography 



Species Index 

 Subject Index 

 Author Index 



nd pathogen 



raph 



no 



115 

 117 

 117 

 118 

 118 

 119 

 120 

 129 

 129 

 129 

 130 

 i:31 



132 

 132 

 132 

 133 

 133 

 133 



137 

 137 

 139 



