Table 1. Three-way analysis of variance for significance (P value) of the effects of silicon amendment to plants, Cnaphalocrocis medinalis infestation and infestation time on enzyme activities and concentrations of malondialdehyde and soluble protein.

	SOD	POD	CAT	PAL	PPO	MDA	Soluble protein
Silicon amendment (A)	<0.001	<0.001	<0.001	<0.001	<0.001	<0.001	0.004
Infestation (B)	<0.001	<0.001	<0.001	<0.001	<0.001	<0.001	<0.001
Infestation time (C)	<0.001	<0.001	<0.001	<0.001	<0.001	<0.001	0.029
A × B	<0.001	<0.001	<0.001	<0.001	<0.001	<0.001	<0.001
A × C	0.18	<0.001	<0.001	<0.001	<0.001	<0.001	0.072
B × C	<0.001	<0.001	<0.001	<0.001	0.11	<0.001	0.038
A × B × C	0.004	0.037	<0.001	<0.001	0.373	<0.001	0.528

SOD = superoxide dismutase; POD = peroxidase; CAT = catalase; PAL = phenylalanine ammonia-lyase; PPO = polyphenoloxidases; MDA = malondialdehyde.