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Egyptian Journal of Biological Pest Control

Table 4 Mortality rates of Hypera postica adults exposed to Steinernema carpocapsae (Black sea isolate), S. feltiae (isolate 09-31), and S. carpocapsae Tokat-Ulas and controls over 120 h from treatment

From: Efficacy of some native entomopathogenic nematodes against the alfalfa weevil, Hypera postica (Gyllenhal) (Coleoptera: Curculionidae), and the lucerne beetle, Gonioctena fornicata (Brüggemann) (Coleoptera: Chrysomelidae), adults under laboratory conditions

Mortality ± SEM*(%)
HAT** Steinernema carpocapsae (Black sea isolate) S. feltiae (isolate 09-31)
500 IJs 1000 2000 Control 500 IJs 1000 2000 Control
32 1.3 ± 1.6b*** 31.1 ± 3.3a 54.3 ± 2.5a 0.0 ± 0.0b 6.3 ± 5.4ab1 26.6 ± 2.4a 25.3 ± 0.4a 0.0 ± 0.0b
40 11.3 ± 4.5b 57.8 ± 1.6a 72.2 ± 1.0a 0.0 ± 0.0c 9.4 ± 5.2ab 31.4 ± 2.9a 31.0 ± 0.5a 0.0 ± 0.0b
48 53.0 ± 5.1a 83.0 ± 5.5a 85.4 ± 3.3a 0.0 ± 0.0b 19.0 ± 6.1ab 39.3 ± 1.3a 52.3 ± 4.3a 0.0 ± 0.0b
56 71.2 ± 2.9a 88.9 ± 5.7a 93.1 ± 2.1a 0.0 ± 0.0b 23.7 ± 5.1a 44.5 ± 2.1a 63.9 ± 3.1a 0.0 ± 0.0b
64 78.6 ± 4.0a 90.6 ± 5.2a 93.1 ± 2.1a 0.0 ± 0.0b 23.7 ± 5.1b 47.2 ± 1.8ab 66.7 ± 2.7a 0.0 ± 0.0b
72 90.4 ± 4.0a 98.7 ± 1.6a 96.1 ± 2.1a 0.0 ± 0.0b 33.9 ± 3.7a 50.0 ± 1.3a 66.7 ± 2.7a 0.0 ± 0.0b
80 90.4 ± 4.0a 98.7 ± 1.6a 96.1 ± 2.1a 0.0 ± 0.0b 42.0 ± 2.0a 50.0 ± 1.3a 66.7 ± 2.7a 0.0 ± 0.0b
88 90.4 ± 4.0a 98.7 ± 1.6a 98.3 ± 1.8a 0.0 ± 0.0b 47.8 ± 4.7a 50.0 ± 1.3a 69.6 ± 2.8a 0.0 ± 0.0b
96 92.0 ± 3.5a 98.7 ± 1.6a 98.3 ± 1.8a 0.0 ± 0.0b 53.3 ± 4.6a 55.3 ± 0.8a 80.2 ± 1.8a 0.0 ± 0.0b
104 92.0 ± 3.5a 98.7 ± 1.6a 98.3 ± 1.8a 0.0 ± 0.0b 66.1 ± 3.7a 63.7 ± 3.1a 85.2 ± 2.8a 0.0 ± 0.0b
112 92.0 ± 3.5a 98.7 ± 1.6a 98.3 ± 1.8a 0.0 ± 0.0b 66.1 ± 3.7a 66.1 ± 2.8a 89.6 ± 3.5a 0.0 ± 0.0b
120 93.4 ± 2.8a 98.7 ± 1.6a 98.3 ± 1.8a 0.0 ± 0.0b 66.1 ± 3.7a 66.1 ± 2.8a 89.6 ± 3.5a 0.0 ± 0.0b
  S. carpocapsae Tokat-Ulas
500 IJs 1000 2000 Control
32 16.9 ± 10.2ab 26.1 ± 5.17ab 52.8 ± 8.2a 0.0 ± 0.0b
40 36.8 ± 6.8a 33.4 ± 5.54a 76.3 ± 4.2a 0.0 ± 0.0b
48 61.0 ± 9.9a 76.3 ± 4.21a 88.7 ± 3.5a 0.0 ± 0.0b
56 83.4 ± 7.2a 88.6 ± 3.09a 93.4 ± 2.8a 0.0 ± 0.0b
64 85.4 ± 6.9a 91.8 ± 2.00a 93.4 ± 2.8a 0.0 ± 0.0b
72 85.4 ± 6.9a 97.0 ± 2.00a 97.0 ± 2.0a 0.0 ± 0.0b
80 90.6 ± 5.2a 98.7 ± 1.60a 98.7 ± 1.6a 0.0 ± 0.0b
88 92.3 ± 6.1a 98.7 ± 1.60a 98.7 ± 1.6a 0.0 ± 0.0b
96 93.7 ± 5.5a 100.0 ± 0.0a 100.0 ± 0.0a 0.0 ± 0.0b
104 95.0 ± 3.9a 100.0 ± 0.0a 100.0 ± 0.0a 0.0 ± 0.0b
112 95.0 ± 3.9a 100.0 ± 0.0a 100.0 ± 0.0a 0.0 ± 0.0b
120 95.0 ± 3.9a 100.0 ± 0.0a 100.0 ± 0.0a 0.0 ± 0.0b
  1. *SEM: standard error of the mean
  2. **HAT: hours after treatment
  3. ***Means in a line followed by the same letter are not statistical significantly different (ANOVA P < 0.05, Tukey’s test)
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