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The Orchid Doctor Articles under the Heading Black Sheaths

Black Sheaths Comments
BLACK SHEATHS: Caused by Fungi Under Excessively Damp Conditions Prevent spread to buds within by cutting off tops of sheaths to let in air; spray with Physan or Tersan. A73-815 0
BLACK SHEATHS: Fungus Disease Occurs especially under humid conditions and when water stands at base of the sheaths; cut off sheath above buds and spray with Tersan, Zineb or Natriphene. N319; cut off just above buds. S203 0

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