DISEASES OF MANGELS AND BEKT 107 



A purple red covering of mycelium is found on the 

 root, causing rotting. No spores are formed. For 

 description of the fungus, see p. 71. 



Attack is said to be worst on badly drained land. 



VII. Beetroot and Mangel Tumour [Oedomyces 

 leproides, see note on p. 108). Sub-Class : Phy- 

 COMYCETE/E ; Order : Chytridiales. 





"^^^£^^-5*^^ 



Fig. 31. — A mangel showing the large tumour on the left side. 



{a) Beetroot. — This disease was found near Al- 

 giers, and described by Trabut. Large brain-like 

 swellings or fleshy tumours are found above the 

 ground, and are attached to the root by a very 

 narrow neck. Spores are found in small cavities 

 in the tumours. 



(^) Mangel. — The author found a similar disease 

 to the above on mangels grown on land heavily 



