Isolation of indigenous strains of the white halo fungus as a biological control agent against 3rd instar larvae of tobacco caterpillar, Spodoptera litura (Fabricius) (Lepidoptera: Noctuidae)

Egyptian Journal of Biological Pest Control

Table 3 Time mortality response of 3rd instar larvae of Spodoptera litura to different fungal isolates of Lecanicillium lecanii

Fungal isolates	Heterogeneity (χ²)	Regression equation	LT₅₀ (days)	Fiducial limit @ 50%	LT₉₀ (days)	Fiducial limit @ 90%
L-1	9.83	y = 2.152x − 0.616	8.60	7.92–9.33	17.28	14.92–20.02
L-2	7.57	y = 2.235x − 0.750	8.72	8.02–9.48	17.97	15.38–21.00
L-3	13.00	y = 1.984x − 0.357	8.83	8.13–9.60	17.33	14.94–20.11
L-4	7.26	y = 2.152x − 0.616	8.97	8.20–9.81	18.96	15.97–22.52
L-5	16.05	y = 1.774x + 0.466	7.77	7.08–8.52	18.32	15.44–21.75
L-6	7.12	y = 2.218x − 0.719	8.84	8.11–9.63	18.49	15.70–21.76
L-7	12.13	y = 2.045x − 0.459	8.50	7.84–9.21	16.47	14.36–18.90
L-8	16.81	y = 1.774x + 0.465	7.70	7.02–8.44	17.99	15.22–21.26
L-9	9.49	y = 2.203x − 0.718	8.54	7.88–9.27	17.02	14.73–19.67