SEARCH

SEARCH BY CITATION

Summary.

An examination of the various theories put forward to account for the fungicidal action of sulphur when applied, not to the plant or fungus, but to a heated surface, has been carried out by chemical methods, and it is concluded:

  • 1
     That, since the volatile agent is capable of passing a glass-wool filter maintained at the temperature of the heated surface, it is gaseous in character.
  • 2
     That the removal of the volatile agent by passage through a cooled glass-wool filter is proof that it is neither sulphur dioxide nor hydrogen sulphide but is elementary sulphur.
  • 3
     That the condensation of sulphur volatilised from the heated surface appears sufficient to account for the reactions ascribed to particulate sulphur.