Repellent Activities of Essential Oils of Some Plants Used Traditionally to Control the Brown Ear Tick, Rhipicephalus appendiculatus

Table 2

Probit analysis of dose-response relationship of Tagetes minuta and Tithonia diversifolia essential oils at RD₅₀ and RD₇₅ generated by a regression model: Probit [Π(dose1)] = 1.1036 + 0.4132 dose1 for the essential oil of T. minuta and the regression model: Probit [Π(dose1)] = 0.6401 + 0.4962 dose1 for the essential oil of T. diversifolia.

Plant species	Repellence probability	Repellent dose (mg)	Upper confidence limit at 95%	Lower confidence limit at 95%
Tagetes minuta	0.50	0.0021	0.0024	0.0019
	0.75	0.0915	0.1012	0.0830
Tithonia diversifolia	0.50	0.2629	0.2712	0.2548
	0.75	0.5972	0.6116	0.5835