| 摘要 |
PROBLEM TO BE SOLVED: To remove a lichen such as Parmelia tinctorum parasitic on a tree with a solvent nontoxic to humans and animals by suppressing the growth of the lichen and killing the lichen without affecting the growth of the tree itself. SOLUTION: This removing agent for the lichen comprises using a carboxylic acid or acetic acid having the simplest shape in the carboxylic acids as an active ingredient and a seawater salt added to the acetic acid. The resultant solution is sprayed or scattered on the tree to kill the lichen. That is, the solution can be used for various kinds of materials to be treated (the tree, a stone wall, a concrete wall, etc.), and the removing agent for the lichen is capable of suppressing the growth of the lichen and killing the lichen.
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