Table 3.

Percent corrected mortality of M. ovinus sheep keds exposed to different concentrations of S. guineense,  N. tabacum, and V. auriculifera aqueous extracts.

Dose (mg/mL)	Corrected mortality rate (%)
	S. guineense		N. tabacum		V. auriculifera
	3 h PI	24 h PI	3 h PI	24 h PI	3 h PI	24 h PI
6.24	0.0 ± 0.0e	0.0 ± 0.0d	0.0 ± 0.0c	0.0 ± 0.0e	0.0 ± 0.0c	0.0 ± 0.0e
12.5	3.3 ± 0.6de	6.7 ± 0.6d	0.0 ± 0.0c	6.6 ± 0.6de	6.7 ± 0.6bc	6.7 ± 0.6de
25	13.3 ± 0.6cd	13.9 ± 0.6cd	6.6 ± 0.6c	16.7 ± 0.6cd	10.0 ± 0.0bc	13.3 ± 0.6cde
50	20.0 ± 0.0c	23.3 ± 0.6c	10.0 ± 0.0c	20.0 ± 0.0c	10.0 ± 0.0bc	16.7 ± 0.6cd
100	40.0 ± 0.0b	43.3 ± 0.6b	13.3 ± 0.6c	36.7 ± 0.6b	16.7 ± 0.6b	23.3 ± 0.6c
200	43.5 ± 0.6b	46.7 ± 0.6b	20.0 ± 0.0b	43.3 ± 0.6b	20.0 ± 0.0b	43.3 ± 0.6b
Control+	73.3 ± 0.6a	100.0 ± 0.0a	73.3 ± 0.6a	100.0 ± 0.0a	73.3 ± 0.6a	100.0 ± 0.0a

⁺Ivermectin (10 μg/mL); PI: postincubation; values are expressed as mean ± SD. Mean values with different letters in the same column are significantly different (P < 0.05).