Who discovered a new infectious agent smaller than viruses and causes potato spindle tuber disease?

Who discovered a new infectious agent smaller than viruses and causes potato spindle tuber disease?
  1. T.O. Diener
  2. M.W. Beijerinck
  3. W.M. Stanley
  4. Dmitri Ivanowsky

Solution

In 1971, T.O. Diener discovered a new infectious agent that was smaller than viruses and caused potato spindle tuber disease.

Asked in: NCERT

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