Table 2.

Results of statistical tests examining the effects of CO₂, temperature and Si supplementation on aphid abundance and colonization success.

Plant response Model fixed effect	Aphid abundance		Aphid colonization
	RD1,159	P	RD1,159	P
CO2	177.62	0.16	215.23	0.026
Temp	162.39	<0.001	197.21	<0.001
Si	160.42	0.16	196.16	0.30
CO2 × Temp	160.24	0.68	195.90	0.61
CO2 × Si	160.24	0.93	195.90	0.99
Temp × Si	160.03	0.65	105.89	0.95
CO2 × Temp × Si	159.91	0.73	194.50	0.24

Statistically significant (P < 0.05) indicated in bold with residual deviation (RD) given.