Table 4.

Correlation coefficients (r) of some biological and physiological characteristics of Plutella xylostella fed on oilseed rape plants treated with jasmonic acid and/or aphid¹ with total glucosinolate content and inhibition of trypsin.

Parameter	Total glucosinolate		Inhibition of trypsin
	r	P value	r	P value
Survivorship	−0.982	0.009	−0.968	0.016
r	−0.916	0.042	−0.916	0.042
FI	−0.916	0.042	−0.881	0.059
RCR	−0.873	0.063	−0.982	0.009
RGR	−0.974	0.026	−0.996	0.002

¹The plants were treated with jasmonic acid (5 mM for 2 days) and/or aphid (20 adults for 2 days) prior to determining nutritional indices of P. xylostella. FI, fitness index; RCR, relative consumption rate; RGR, relative growth rate.