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Table 2 Probit analysis of mortality rates of Spodoptera littoralis larval instars (L2:L5) on the 5th day post-Beauveria bassiana (Y-F_ITS1) treatments

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

Larval instars

LC

Spores/ml

Lower limit

Upper limit

Slope

L2

LC50

2.5 × 105

4.7 × 103

4.5 × 106

0.4173

LC90

3.0 × 108

5.1 × 107

9.5 × 108

L3

LC50

6.2 × 107

1.0 × 107

3.9 × 109

0.3247

LC90

5.5 × 1011

1.4 × 1011

8.5 × 1012

L4

LC50

1.7 × 108

1.0 × 105

2.9 × 109

0.1986

LC90

5.0 × 1010

3.3 × 1012

7.0 × 1012

L5

LC50

1.5 × 1013

4.7 × 109

8.4 × 1013

0.2955

LC90

3.2 × 1013

1.4. × 1011

9.0 × 1016