birch tar oil

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birch tar oil

(berch tar oyl),
Pyroligneous oil obtained by the dry distillation of the wood of Betula alba and rectified by steam distillation; used externally in the treatment of skin diseases.
Synonym(s): birch tar
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References in periodicals archive ?
The effect of birch tar as an odorous repellent was studied at Kannonkoski, central Finland.
Birch tar has yielded promising results in the repulsion of slugs and snails (Lindgvist et al.
Our experiments were focused on implications what different birch tar treatments may have on moose damage to Scots pine.
This also indicates that birch tar did not affect moose activity and thus behaviour at stand level.
For example, it may be possible that the birch tar was not properly applied to the shoots or the compounds in the tar are not effective against moose.