Larvicidal, Ovicidal, and Repellent Activities of Leucas stachydiformis (Hochst. ex Benth.) Briq Essential Oil against Anopheles arabiensis

Table 3

Hatchability of Anopheles arabiensis eggs after 72 h of exposure with essential oil of Leucas stachydiformis.

Concentration (ppm)	Hatchability % ± SD	IH50 (95% CI) ppm	IH90 (95% CI) ppm	Chi-square
400	0 ± 0.0	32.2 (24.1–42.5)	144.7 (99.8–252.3)	4.1
200	16 ± 2.2
100	25 ± 3.5
50	36 ± 1.4
25	50 ± 1.2
12.5	85 ± 2.5
6.25	90 ± 1.5
Negative control	100 ± 0.0

Values were based on seven concentrations and four replications with 25 eggs in each test cup. Chi-square value was significant at level. IH₅₀, 50% hatching inhibition concentration; IH₉₀, 90% hatching inhibition concentration; CI, confidence interval.