Assessment of Verbesina alternifolia and Mentha piperita oil extracts on Clinostomum phalacrocoracis metacercariae from Tilapia zillii

Beni-Suef University Journal of Basic and Applied Sciences

Table 1 Anthelmintic efficacy [Mean mortality % ± standard error of the mean (SEM)] of different concentrations of Verbesina alternifolia and Mentha piperita oil extract on excysted metacercariae of Clinostomum phalacrocoracis as compared to phosphate buffer saline (PBS) control and solvent control

Group	N	Concentration (ppm)	Mean mortality % ± SEM
Group	N	Concentration (ppm)	Per concentration	Overall
Verbesina alternifolia	10	100	10.0 ± 7.07	34.38^a ± 7.24
	10	200	17.5 ± 8.54
	10	400	50.0 ± 10.80
	10	600	60.0 ± 14.72
Mentha piperita	10	400	0.0 ± 0.0	6.25^b ± 3.40
	10	600	0.0 ± 0.0
	10	800	7.50 ± 4.79
	10	1000	17.50 ± 11.81
PBS control	20	–	0.0	0.0^b ± 0.0
Solvent control	20	–	0.0	0.0^b ± 0.0

Different letters within the overall mortality column indicate significantly different means at p < 0.05 (Tukey HSD test)