Effect of entomopathogenic nematode, Steinernema feltiae, on survival and plasma phenoloxidase activity of Helicoverpa armigera (Hb) (Lepidoptera: Noctuidae) in laboratory conditions

Egyptian Journal of Biological Pest Control

Table 2 Phenoloxidase units of injected nematode, Ringer’s solution as compared to those of non-injected insects at different time intervals

Time intervals	Nematode-injected insects	Ringer’s solution injected insects	Non-injected insects
15 min pi	0.093 ± 0.002^g	0.127 ± 0.001^cd	0.107 ± 0.001^a
30 min pi	0.198 ± 0.013^d	0.110 ± 0.008^ef	0.105 ± 0.001^a
1 h pi	0.123 ± 0.001^e	0.128 ± 0.005^cd	0.105 ± 0.001^a
1.5 h pi	0.067 ± 0.002^h	0.146 ± 0.013^b	0.107 ± 0.001^a
2 h pi	0.105 ± 0.006^fg	0.095 ± 0.006^fg	0.105 ± 0.000^a
4 h pi	0.119 ± 0.012^ef	0.084 ± 0.006^g	0.107 ± 0.001^a
6 h pi	0.119 ± 0.001^ef	0.138 ± 0.003^bc	0.104 ± 0.001^a
8 h pi	0.271 ± 0.026^c	0.180 ± 0.000^a	0.106 ± 0.001^a
10 h pi	0.299 ± 0.012^b	0.087 ± 0.009^g	0.104 ± 0.003^a
16 h pi	0.340 ± 0.009^a	0.093 ± 0.003^g	0.107 ± 0.000^a
24 h pi	0.298 ± 0.006^b	0.120 ± 0.002^de	0.103 ± 0.001^a

In each column, similar lowercase letters in the same column are not significant (P < 0.05)