Effects of Pyriproxyfen on Life Table Indices of Plutella xylostella in Multigenerations

Table 3

The effects of pyriproxyfen on the developmental period of 3rd instar larvae of P. xylostella in two subsequent generations.

Treatments	Developmental time (mean SE) (day)					df
	Control	LC10	LC25
Egg	2.18 ± 0.03	3.31 ± 0.04	3.54 ± 0.05	313.34	<0.0001	2, 281
Larva 1	2.98 ± 0.05	2.84 ± 0.14	2.48. ± 0.14	7.01	0.0012	2, 151
Larva 2	1.61 ± 0.08	2.18 ± 0.19	2.00 ± 0.20	3.83	0.0244	2, 122
Larva 3	1.25 ± 0.07	1.88 ± 0.24	1.85 ± 0.25	6.03	0.0032	2, 114
Larva 4	1.51 ± 0.06	3.25 ± 0.20	2.25 ± 0.37	37.65	<0.0001	2, 101
All larvae	7.44 ± 0.23	9.88 ± 0.28	8.31 ± 0.53	22.29	<0.0001	2, 99
Prepupa	0.40 ± 0.06	0.26 ± 0.08	0.25 ± 0.11	1.04	0.3559	2, 99
Pupa	3.70 ± 0.10	4.42 ± 0.17	4.46 ± 0.40	6.69	0.0019	2, 94
Pre adult stages	13.61 ± 0.19	18.11 ± 0.42	16.60 ± 0.77	52.37	<0.0001	2, 94
Total life span (male)	30.78 ± 1.26	31.78 ± 1.09	23.71 ± 1.92	4.94	0.0114	2, 48
Total life span (female)	31.30 ± 1.18	32.90 ± 2.15	27.44 ± 2.23	1.72	0.1910	2, 48

indicates that means marked with the same letters within a row are not significantly different (Tukey’s test; P < 0.05).