Table 1 . A two-way ANOVA for the percentage mortality of the transgenic and control lines under normal and BmNPV infected conditions.

Source of variation	Sum of squares	d.f.	Mean squares	F ratio	P
Lines	4738.72	5	947.74	41.25***	0.0001
Treatments	14120.53	1	14120.53	614.67***	0.0001
Lines × treatments	3285.97	5	657.19	28.60***	0.0001
Within	1929.68	84	22.97
Total	24074.92	95

A two-way analysis of variance for the percentage mortality of the IE, MG(+), MG(−), MG(±), MG(+) × MG(−) and control lines under normal and BmNPV infected conditions. Degrees of freedom (d.f.) for each source of variation, treatment, lines, and interactions between these is shown with sum of squares. The average numbers of three experiments, N = 96. ***P < 0.001.