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Mean pine weevil weight ± standard error per treatment at the start of the experiment (green bars) and after Hylobius abietis was exposed to 7 consecutive days of Bt‐treated food (blue bars) and 7 subsequent days of non‐Bt treated food (stem pieces of Picea abies) (yellow bars). Treatments are abbreviated as follows: control (C), Bt galleriae (low and high concentration: BL, BH), Bt israelensis (VL, VH), Bt tenebrionis (NL, NH).
