Figure 4.

Total pine weevil mortality (percentage of dead weevils: number of dead pine weevils out of total n = 17) per treatment after Hylobius abietis was exposed to a total 7 days of Bt‐treated food and an additional 7 days of non‐Bt treated food (stem pieces of Picea abies) in an experiment comparing individual and combination of Bt formulations. Treatments are abbreviated as follows: Bt galleriae formulation (B); Bt israelensis (V); Bt tenebrionis (N); combination of formulations (BN, BV, VN and BVN).