EXTERMINATING AGENT AGAINST MISCELLANEOUS ALGAE AND DISEASE INJURIES OF CULTURED LAVER

摘要

PURPOSE: To provide a medicine capable of exterminating miscellaneous algae and a bacterium or a fungus of the genus Pythium, Olpidiopsis, etc., causing red rot or chytrid blight in an ultrashort time as compared with that of other organic acids. ;CONSTITUTION: This exterminating agent against miscellaneous algae and disease injuries of cultured laver contains ≥0.1wt./vol.% ketoglutaric acid as the active ingredient. At least one selected from the group consisting of ammonium nitrate, ammonium chloride, monoammonium phosphate, urea, sodium nitrate and nitric acid as the nitrogen source and monopotassium phosphate, monosodium phosphate, phosphoric acid and inositol 6-phosphate as the phosphorus source can be contained in the exterminating agent. Furthermore, at least one selected from the group consisting of citric acid, malic acid, tartaric acid, succinic acid, gluconic acid, acetic acid, chloroacetic acid, lactic acid, maleic acid, fumaric acid, formic acid, hydrochloric acid, phosphoric acid, nitric acid and sulfuric acid can be used in combination so as to enhance exterminating effects. The fungus of the genus Pythium causing red rot can be exterminated in 1min. and green laver can be exterminated in 5min. by immersing the laver in a solution of seawater containing 0.5wt./vol.% ketoglutaric acid.;COPYRIGHT: (C)1995,JPO