Leaf-cutter ants of the genus Atta are pests controlled by broad-spectrum insecticides that adversely affect the environment and human health. Toxicity of 20 concentrations of chemical imidacloprid + λ-cyhalothrin and biological insecticides azadirachtin and spinetoram were evaluated on workers of A. mexicana and A. cephalotes ants. Initial evaluation determined optimal concentrations to kill 10-90%. Mean…

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