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Residue concentration in OSR-flowers at different dates relative to application. a Thiacloprid residues. b Prochloraz residues. T-b: Treatment B. terrestris; T-o: Treatment O. bicornis. Treatments are shown as boxplots with median; the edges of the box indicate the 25th and 75th percentiles. Outliers are shown as circles. Boxplots sharing the same letter do not differ significantly at p < 0.05; n = 7
