Assessment of Antitick and Repellent Activity of Azadirachta indica Oil against Adults and Larvae Stages of Rhipicephalus microplus

Table 1

Dose-response data of therapeutic grade A. indica oil and fipronil against adults of R. microplus.

	Concentrations (%)	Number of ticks treated	Weight of ticks (mg) (mean ± SE)	Mortality of ticks (%)	Egg mass (mg) (mean ± SE)	RI	IO (%)
A. indica oil	0.625	15	2863 ± 0.007	13.33	626 ± 0.001	21.86	61.3
	1.25	15	2894 ± 0.003	33.33	580 ± 0.003	20.04	66.4
	2.5	15	2770 ± 0.003	60.0	523 ± 0.002	18.88	68.3
	5	15	1761 ± 0.008	73.33	280 ± 0.003	15.90	73.3
	10	15	1998 ± 0.067	86.66	154 ± 0.002	7.70	87.1
	Control	15	2929 ± 0.029	0.0	1750 ± 2.88	59.74	0.0
Fipronil	0.59	15	2477 ± 0.017	26.66	870 ± 0.010	35.12	42.4
	1.18	15	2477 ± 0.009	46.66	830 ± 0.006	33.50	45.1
	2.36	15	2437 ± 0.019	86.66	235 ± 0.008	9.64	84.20
	4.73	15	2352 ± 0.054	99.33	0.0	0.0	100
	Control	15	2767 ± 0.017	0.0	1689 ± 0.032	61.04	0.0

RI = reproductive index; IO (%) = inhibition of oviposition.