Table 2 Efficacy of EPN species at concentrations of 50, 100 and 125 IJs/larva against the 3rd instar larvae of Pieris rapae after different time intervals
Treatments | % Mortality of 3rd instar Pieris rapae larvae at time intervals post treatments | ||||
|---|---|---|---|---|---|
One day | Two days | Three days | Four days | Five days | |
| Â | 50 IJs/larva | ||||
Steinernema Hecarpocapsae (All strain) | 4.00 a | 24.00 ab | 52.00 ab | 72.00 b | 96.00 ab |
S. feltiae (Filipjev) | 0.00 | 16.00 b | 44.00 b | 64.00 b | 88.00 b |
Heterorhabditis bacteriophora (HP88) | 8.00 a | 28.00 a | 60.00 a | 88.00 a | 100.00 a |
H.bacteriophora (Ar-4) | 0.00 | 20.00 ab | 44.00 b | 76.00 ab | 100.00 a |
| Â | 100 IJs/larva | ||||
S.carpocapsae (All strain) | 8.00 a | 24.00 ab | 52.00 b | 80.00 ab | 96.00 a |
S. feltiae (Filipjev) | 8.00 a | 16.00 b | 52.00 b | 72.00 b | 92.00 a |
H.bacteriophora (HP88) | 16.00 a | 28.00 ab | 68.00 a | 92.00 a | 100.00 a |
H.bacteriophora (Ar-4) | 12.00 a | 32.00 a | 68.00 a | 88.00 a | 100.00 a |
| Â | 125 IJs/larva | ||||
S.carpocapsae (All strain) | 12.00 a | 28.00 a | 56.00 b | 88.00 ab | 96.00 a |
S. feltiae (Filipjev) | 8.00 a | 24.00 a | 56.00 b | 76.00 b | 92.00 a |
H.bacteriophora (HP88) | 20.00 a | 36.00 a | 72.00 a | 100.00 a | 100.00 a |
H.bacteriophora (Ar-4) | 16.00 a | 36.00 a | 72.00 a | 92.00 a | 100.00 a |