Pathogenicity of entomopathogenic nematodes against the new invasive fall armyworm, Spodoptera frugiperda (J. E. Smith) (Lepidoptera: Noctuidae)

Egyptian Journal of Biological Pest Control

Table 1 Pathogenicity of Steinernema carpocapsae nematode against different larval instars of Spodoptera frugiperda at different concentrations (IJs/ml) after 48 h of exposure

Larval instar	LC₅₀ (IJs/larva)	Slope ± SE	Coefficients (intercept)	R²	Correlations	P-value
3nd instar	170.415	0.017 ± 0.012	72.219	0.296	0.611	0.020
4th instar	318.252	0.012 ± 0.007	51.389	0.484	0.696	0.015
5th instar	567.108	0.023 ± 0.009	5.554	0.675	0.822	0.656

LC₅₀ values on the 2nd and 6th larval instar were not calculated as 100% mortality was caused at all tested concentrations
LC₅₀ Lethal concentration kills 50% of FAW larvae