Table 3. Life tables for different populations of Nilaparvata lugens.

Parameter	1st generation	7th generation	17th generation	24th generation	24th-u generation
Neonate number	100	100	100	100	100
Survival rate from neon ate to 3rd instar (%)	90.7 ± 2.4a	80.8 ± 3.5b	77.4 ± 3.8b	78.9 ± 4.1b	88.3 ± 4.9a
Survival rate from 3rd to 5th instar (%)	92.3 ± 4.1a	91.6 ± 4.7a	90.2 ± 6.2a	91.4 ± 7.1a	92.9 ± 5.4a
Emergence rate (%)	91.1 ± 3.7a	82.7 ± 4.1b	81.6 ± 3.6b	80.2 ± 4.3b	92.0 ± 4.4a
Female ratio (%)	49.2 ± 2.9a	48.1 ± 3.8a	48.9 ± 4.5a	47.8 ± 3.9a	48.8 ± 3.7a
Copulation rate (%)	86.3 ± 5.3a	88.4 ± 6.2a	84.9 ± 4.8a	83.9 ± 6.7a	87.9 ± 5.1a
Fecundity (eggs per female)	354.8 ± 28.9a	328.5 ± 36.4ab	307.9 ± 29.3b	305.5 ± 31.8b	369.7 ± 38.2a
Hatchability (%)	87.3 ± 4.6a	86.4 ± 5.1a	86.2 ± 6.0a	85.8 ± 4.8a	86.2 ± 5.5a
N, predicted number of offspring	10030.0	7386.8	6277.3	6079.8	10316.4
I, population trend index	100.3	73.9	62.8	60.8	103.2
Relative fitness	1.00	0.74	0.63	0.61	1.03

Different values in the same row showed the significant difference at 0.05 level.