Abstract: ObjectiveThe orthogonal design was applied to the choice feeding test on field to screen on the combination of attractants of rodenticide baits and to evaluate the palatability of the trial poison baits and the mortality of the most suitable trail poison bait.MethodsThe orthogonal table L₁₈(2¹×3⁷) was selected.18 kinds of 0.005% bromadiolone trial poison baits combined by glucide,peanut oil,salt and alcohol on 2～3 levels of concentration and the control poison bait were tested in the choice trial on field,in which SPLM was implemented in analysis of variance.ResultsThe 13th trial poison bait was the most suitable,which feeding coefficient was 1.55,relatively that of control poison bait was 0.51.On the field poisoning test,the most suitable poison bait gave 100% mortality,but control poison bait 79.0%.ConclusionThe field trial of screen on the combination of attractants of rodenticide baits by the orthogonal design was feasible;the mortality of the most suitable trail poison bait was better.