Table 5.

Analysis of deviance (degrees of freedom, df; chi‐square statistic, χ ²; P value, P) results from linear models

	Area debarked (mm2) during 3 days of Bt‐treated food			Area debarked (mm2) during 5 days of Bt‐treated food			Area debarked (mm2) during 7 days of Bt‐treated food			Mortality after 7 days of Bt food + 7 days non‐Bt food in box
	df	χ 2	P	df	χ 2	P	df	χ 2	P	df	χ 2	P
Treatment	6	55.59	<0.0001	6	61.93	<0.0001	6	75.36	<0.0001	6	15.4	0.02
Contrasts	df	t	P	df	t	P	df	t	P	df	z	P
B vs BN	104	−1.23	0.88	104	−1.04	0.94	104	−0.83	0.98	NA	0.37	0.99
B vs BV	104	5.51	<0.0001	104	4.30	0.0007	104	3.65	0.007	NA	−1.87	0.50
B vs BVN	104	4.02	0.002	104	4.37	0.0006	104	4.29	0.0008	NA	0.37	0.99
V vs BV	104	−0.17	1.00	104	0.65	0.99	104	0.47	0.99	NA	0.38	0.99
V vs VN	104	−0.17	1.00	104	−0.08	1.00	104	0.85	0.97	NA	0.73	0.99
V vs BVN	104	1.55	0.71	104	1.37	0.81	104	0.70	0.99	NA	−1.88	0.49
N vs BN	104	1.08	0.93	104	0.005	1.00	104	−0.93	0.97	NA	2.39	0.21
N vs VN	104	3.29	0.02	104	4.57	0.0003	104	5.78	<0.0001	NA	−3.87	0.003
N vs BVN	104	−2.60	0.14	104	−4.03	0.002	104	−4.93	0.0001	NA	2.39	0.21

These models examined the effect of treatment (Bt galleriae formulation (B); Bt israelensis (V); Bt tenebrionis (N); combination of formulations BN, BV, VN, and BVN) on total Hylobius abietis consumption (mean area debarked, mm²) during 3, 5 and 7 cumulative days of feeding on Bt‐treated food (stem pieces of Picea abies) and total mortality (number of dead weevils) after these 7 days and an additional 7 days exposed to non‐Bt treated food in boxes. Pairwise comparisons (Tukey's multiple comparisons) examine differences among combinations and individual Bt formulations. Significant effects (P < 0.05) are shown in bold.