| 摘要 |
PURPOSE:The titled treating agent, containing a germanium compound as an active constituent, capable of selectively removing marine adhesive algae growing on fishing nets or ropes and promoting efficiently the growth thereof without effecting large-sized algae, e.g. WAKAME seaweeds, AMANORI, etc., and useful for growing and culture. CONSTITUTION:A treating agent containing a germanium compound, e.g. germanium dichloride, germanium tetrachloride, germanium tetrafluoride, germanium dioxide, germanium hydroxide or orthogermanic acid, etc. as an active constituent. The above-mentioned compounds are contained as the treating agent in the form of an aqueous solution, suspension, emulsion or a paint containing a natural resin such as solid pine resin, e.g. abietic acid, or a synthetic resin, e.g. acrylic resin or epoxy resin, etc. as a vehicle. The amount of the germanium to be incorporated in the treating agent is <65wt%. The above-mentioned agent dipped in weir nets before planting of spores of the large-sized algae or impregnated by coating and dried for treatment. The spores are then applied to the nets, and sunk in a culture sea area after the planting of the spores.
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