Subramanian, S.2014-06-202014-06-201983Aquaculture,35 (1983) 273-275http://hdl.handle.net/123456789/3162A simple method is described for the eradication of undesirable fishes from fish culture ponds by application of ammonia. Modifying an earlier technique of direct injection of anhydrous ammonia, a trial was carried out in which ammonia was released by the application of solutions of calcium hydroxide and ammonium sulphate in a ratio of 1:1.8. Ammonia at a concentration of 15 ppm (12.4 ppm N) killed plankton, minnows and predatory fishes including the air breathing species. The advantages of the method are discussed.enArticle