Biennial aerial application of Bacillus thuringiensis Berliner var. kurstaki is the most cost-effective approach of protection against spruce budworm (Choristoneura fumiferana [Clemens])

Table 3 Summary of repeated-measures ANOVA using PROC GLIMMIX showing the effects of various Btk spray scenarios and number of years after the first treatment on balsam fir and spruce mortality

Source of variation	Balsam fir			White spruce			Black spruce
	F	df	p	F	df	P	F	df	p
Protection scenario	7.16	4,110	< 0.0001	2.90	4,82	0.0266	3.67	4,82	0.0084
Years after 1st treatment	6.77	7,110	< 0.0001	0.83	5,82	0.8331	0.62	5,82	0.6857
Interaction	0.44	28,110	0.9933	0.22	20,82	0.9998	0.48	20,82	0.9655

ISSN: 1297-966X