Isolation, identification and virulence of indigenous entomopathogenic fungal strains against the peach-potato aphid, Myzus persicae Sulzer (Hemiptera: Aphididae), and the fall armyworm, Spodoptera frugiperda (J.E. Smith) (Lepidoptera: Noctuidae)

Egyptian Journal of Biological Pest Control

Table 3 Median lethal concentration (LC₅₀) values for the indigenous strains of entomopathogenic fungi Beauveria bassiana and Metarhizium anisopliae bioassayed against late 3rd instar nymphs of peach-potato aphid Myzus persicae under laboratory conditions

EPF strains	Time (days)	LC₅₀ (conidia/ml)	Lower and upper 95% Fiducial Limits (conidia/ml)	X² (df = 30)*	P-value	Slope ± S.E
Beauveria bassiana	7	1.674E + 07	8.543E + 06 − 3.069E + 07	57.638	≥ 0.001	0.417 ± 2.71
	10	7.752E + 06	3.043E + 06 − 1.580E + 07	108.124	≥ 0.001	0.547 ± 0.30
Metarhizium anisopliae	7	1.122E + 08	4.466E + 07 − 3.979E + 08	69.012	≥ 0.001	2.972 ± 0.26
	10	8.701E + 07	4.362E + 07 − 1.965E + 08	53.890	≥ 0.001	3.724 ± 0.28

*Since the significance level is less than 0.150, a heterogeneity factor is used in the calculation of confidence limits