Patent ID: 7198797

Claim:
A method of controlling aquatic environment insects by a) making a rapidly spreading initially non-larvicidal, evaporation suppressant powder by blending unbranched fatty alcohols selected from the group consisting of stearyl alcohol, cetyl alcohol and mixtures thereof, in a suitable proportion with a mineral component selected from the group consisting of hydrated lime, acidified gypsum and bicarbonate of soda: b) coating a mosquito specific entomopathogen with a mixture of lauryl alcohol and a mineral oil, the mineral oil at being less that 10% of the lauryl alcohol, to provide a hydrophobic larvicide, c) while providing temperature low enough not to damage larvicide potency d) converting the non-larvicidal evaporation suppressant powder into a larvicidal evaporation suppress and powder effective to control a target pest, by intimately blending said initially non-larvicidal evaporation suppressant powder together with said larvicidal mixture, in sufficient proportions to provide a lethal dose of larvicidal and rapid spread of evaporation suppression film, and e) spreading the resultant powder on water harboring or known to harbor target insect larvae, such that sufficient effective larvicide will be rapidly spread to all parts of the target water surface, and the film former will suppress the evaporation of water.