Process for making larvicidal evaporation suppressant powder

Details Process for making larvicidal evaporation suppressant powder Process for making larvicidal evaporation suppressant powder

2007-04-03

2007-04-03

Levy, Neil S. (Department: 1615)

Drug, bio-affecting and body treating compositions

Preparations characterized by special physical form

Biocides; animal or insect repellents or attractants

C424S405000, C424S408000, C424S409000, C424S417000, C424S421000, C424S093461, C424S093100

Reexamination Certificate

active

10470627

ABSTRACT:
A water-free process for converting initially non-larvicidal evaporation suppressant powder into a larvicidal variant possessing utility both for abatement of use by mosquitoes of an open water catchment as a successful breeding site, and for conserving water by suppressing the evaporation of water from the same catchment. Lauryl alcohol is used as a blending agent to facilitate even distribution of mosquito-specific entomopathogens, eg., spores ofBacillus thuringiensisvarietyIsraelensisorBacillus sphaericus, into the initially non-larvicidal evaporation suppressant powder. Cetyl alcohol and/or stearyl alcohol are the preferred monolayer-formers upon which effective evaporation suppression relies. For a variant larvicidal powder that lacks an effective evaporation suppression property, the same preferred monolayer-formers may be omitted from a blend of mosquito-specific pathogens, lauryl alcohol, and hydrated lime or, alternatively, acidified gypsum.

REFERENCES:
patent: 5567430 (1996-10-01), Levy
patent: 5824328 (1998-10-01), Levy

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