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. 2012 May 31;7(5):e36533. doi: 10.1371/journal.pone.0036533

Figure 4. Temporal decay in the efficacy of insecticide treatments against Andean potato weevils (Premnotrypes spp.), as applied by farmers.

Figure 4

The x-axis shows the parameter estimate ± SEM associated with the effect of a single insecticide application on the proportion of tubers infested with weevils (sqrt-transformed). The y-axis shows the month of the insecticide treatment.