Chemical Composition and Larvicidal Activity of Lavandula angustifolia Subsp. angustifolia and Lavandula dentata Spp. dentata Essential Oils against Culex pipiens Larvae, Vector of West Nile Virus

Table 2

Lethal concentrations (LC₅₀ and LC₉₀) of L. angustifolia subsp. E. Oils and L. dentata spp. E. Oils.

Plant species	The probit model: a + b. log(dose)	LC50 (µg/ml) (Ll-Ul)	LC90 (µg/ml) (Ll-Ul)	Calculated Chi-square
L. angustifolia subsp.	Y = 2.18341 + 2.60318X	140 ± 0.1 (70–200); X = −8.38749e − 01	450 ± 0.05 (350–610); X = −3.46378e − 01	4.31
L. dentata spp.	Y = −1.22979 + 2.87581X	2670 ± 0.07 (1750–3480); X = 5.92320e − 01	7400 ± 0.05 (5990–9870); X = 1.15369e + 00	2.79

Ll-Ul: lower limit-upper limit; LC₅₀ = lethal concentration that kills 50% of the exposed larvae; LC₉₀ = lethal concentration that kills 90% of the exposed larvae.