Smaller animals are in greater danger of ingesting a lethal dosage. Logic, by virtue of its lower toxicity level, would need to be consumed at a much higher rate to produce comparable effects. In addition to killing fire ants, Amdro kills harvester ants. At a higher concentration, the active ingredient in Amdro kills cockroaches. When used as recommended, Logic affects only ants, including harvester ants and other ant species that compete with fire ants.
Logic is also toxic to fish.
Logic dissipates rapidly in soil. Neither product remains toxic for an extended period of time in the environment. Effectiveness of Amdro and Logic. Table 1 is a summary of the results of the study. Table of fire ant mound and population reduction rates for a single application of Amdro and Logic.