A set of discrete formulae for the performance of a tsetse population during aerial spraying

► A formula for the survival of original flies, which existed at the commencement of spraying. ► A formula for the survival of original pupae, which existed at the commencement of spraying. ► A formula for the survival of flies which ecloded from the original pupae. ► One formula each, for pupae which are the immediate descendants of both original categories and one formula each, for the flies of the same origins. ► Two formulae for the survival of flies and pupae which are third and higher generation descendants.