FUNGOID DISEASES OF CRUCJFERS 97 



protoplasmic mass enters the plant, are points await- 

 ing solution. 



Pi^eventive Me as it res, — 



1. Do not grow cruciferous plants too often on 

 the same land. 



2. Remove diseased roots from the field. 



3. Do not spread refuse from the turnip heaps 

 on land where turnips, etc., are to be grown. 



4. Disease is most prevalent on sour land ; 

 sweeten such land by drainage, and by the applica- 

 tion of about 2 tons or more of lime per acre, 

 immediately the turnip crop is removed, and in 

 extra quantities where the disease was worst. Gas 

 lime is of little value for the purpose. 



5. Keep down cruciferous weeds — charlock, 

 shepherd's purse, etc. 



6. Avoid the use of acid manures, e.g. super- 

 phosphate. 



7. Prevent as far as possible the transportation 

 of soil from infected to healthy areas. 



8. Do not raise seedlings for trans[)lanting on 

 land that is susceptible to the disease. 



9. Do not plant clubbed seedlings. 



II. Damping Off [Pythiuvi dc Baryaumu). 

 Class : PiivcoMVCETE/K ; Order : Saprolf(;niales. 



A troublesome disease to the gardener, most 



cruciferous plants being affected, but especially 



mustard and cress. It is not confined to crucifers 



only. 



7 



