Insecticidal Properties of the Fatty Acids and their Ammonium Salts Obtained from Coconut Oil

1. Caprylic (C8), capric (C10), lauric (C12) and myristic (C14) acids were obtained from coconut oil and their ammonium salts were prepared. 2. Their insecticidal powers were determined by using Minomushi (Clania minucula BUTLER). In the case of fatty acids, they were of dissolved to 25% and 50% in xylene. The order of insecticidal power was C8>C1O>C14>C12. 3. In case of ammonium salts, they were dissolved in water to 1%. The order of insecti-cidal power was C8>C10>C12_??_C14.