On Permethrin 1:1 and 1:5 Ratios
"No significant difference in mortality was observed between the 1:1 and 1:5 formulations - therefore, from a purely economic standpoint, this marginal increase in mortality may not justify the increased cost of using the 1:5 formulation."
R.L. Groves: M.V. Meisch & R. Nunez
Journal of the AMCA, 1995