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Disease Details

Collar rot (Sclerotium rolfsii Sacc.)

S. rolfsii primarily infects ramie stem, although it may affect any part of the plant under favorable environmental condition.


  • the initial visible symptoms are progressive yellowing and wilting of the leaves.
  • The first signs of infection, are dark-brown lesions on the stem at or just beneath the soil level.
  • Ramie seedlings are very susceptible and die quickly once they become infected.


Mustard like sclerotial bodies germinate very rapidly as soon as the favourable condition occurs in the field.


Temperature: 20-300 C


Frequent rain followed by warm temperature is the most conducive factors for the development of this disease.

Cercospora leaf spot

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