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Egyptian Journal of Biological Pest Control

Table 1 Efficacy of the Beauveria bassiana (Y-F_ITS1) against different larval instars of Spodoptera littoralis under laboratory conditions

From: Pathogenicity induced by indigenous Beauveria bassiana isolate in different life stages of the cotton leafworm, Spodoptera littoralis (Boisduval) (Lepidoptera: Noctuidae) under laboratory conditions

Concentrations (spores ml−1) Larval instars Mortality percentage
1 day 2 days 3 days 4 days 5 days
1 × 106 L2 0.0 16.0 a 50.0a 76.0a 85.0a
L3 0.0 6.0b 45.0b 63.0b 65.0b
L4 0.0 6.0b 40.0c 55.0c 63.0b
L5 0.0 0.0c 10.0d 13.0d 15.0c
1 × 107 L2 16.0 53.0a 60.0a 93.0a 95.0a
L3 0.0 33.0b 53.0b 75.0b 75.0b
L4 0.0 16.0c 50.0b 63.0c 73.0b
L5 0.0 3.0d 13.0c 18.0d 23.0c
1 × 108 L2 23.0 65.0a 83.0a 96.0a 96.0a
L3 0.0 38.0b 80.0a 86.0b 88.0b
L4 0.0 20.0c 53.0b 73.0c 75.0c
L5 0.0 5.0d 22.0c 25.0d 46.0d
1 × 109 L2 30.0 75.0a 90.0a 97.0a 99.0a
L3 0.0 43.0b 85.0b 89.0b 90.0b
L4 0.0 23.0c 60.0c 85.0c 88.0c
L5 0.0 7.0d 33.0d 40.0d 56.0d
Control L2:5 0.0 0.0 0.0 0.0 0.0
  1. Means of the same column at the same concentration followed by different letters are significantly different (P ≤ 0.05)
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