Symptoms 



Wart -like outgrowths, white, green or 

 blackish. Wart disease due to Synchytrium 

 endobioticum. Plant only immune varieties. 

 Notify Ministry of Agriculture. 



Decay in store, brown depressed patches 

 with patches of white fungus thereon. Winter 

 rot, due to Fusarium Solani. Ventilate clamp 

 thoroughly. 



Never plant diseased tvbers. 



Stem. — Wilts and turns black at base, 

 especially in vascular bundles. Bacillus solana- 

 cearum. Do not use tubers for seed. Remove 

 plant completely. 



Foliage. — Black spots rapidly extending in 

 damp summer weather. Grey below. Blight 

 due to Phytophthora infestans. Spray before 

 outbreak with Bordeaux or Burgundy mix- 

 ture (7). 

 Primbosb. 



FoUage with yellowish patches on upper and 

 under side, bearing tufts of fimgus threads, due 

 to Ramularia Primulae. Spray with Bordeaux 

 mixture. 

 Primula. 



Few fungi attack species of Primula in this 

 country, but P. megaseaefolia is often attacked 

 by a fungus which produces brown spots on the 

 leaves. Spray with potassium sulphide or 

 Bordeaux mixture. 



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