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Table 2 Effects (mean percentage ± SE) of tested essential oils on inhibition of egg hatching of H. contortus

From: Essential oils of Citrus aurantifolia, Anthemis nobile and Lavandula officinalis: in vitro anthelmintic activities against Haemonchus contortus

Concentration (mg/ml) C. aurantifolia A. nobilis L. officinalis
50 100.0 ± 0.0a,b 99.0 ± 0.38a,b 100.0 ± 0.0a,b
25 100.0 ± 0.0a,b 99.4 ± 0.87a,b 100.0 ± 0.0a,b
12.5 98.9 ± 1.87a,b 97.0 ± 2.38a,b 99.8 ± 0.30a,b
6.25 96.4 ± 2.61a,b 95.7 ± 2.13a,b 99.4 ± 0.94a,b
3.125 95.9 ± 2.41a,b 86.4 ± 4.71b 92.3 ± 3.03b
1.562 86.9 ± 2.33b 74.5 ± 3.58b 82.8 ± 3.62b
0.781 56.2 ± 3.97b 63.3 ± 4.12b 85.0 ± 3.15b
0.390 42.1 ± 4.70b 26.6 ± 1.46b 81.8 ± 1.36b
0.195 14.9 ± 3.89b 13.4 ± 2.33b 9.5 ± 1.54b
0.097 13.0 ± 1.44b 14.1 ± 2.60b 6.8 ± 1.69
  IC50 = 0.694 mg/ml IC50 = 0.842 mg/ml IC50 = 0.316 mg/ml
  R2 = 0.985 R2 = 0.978 R2 = 0.950
Thiabendazol (0.025 mg/ml) 100.0 ± 0.0b 100.0 ± 0.0b 100.0 ± 0.0b
Tween 80 (3%) 7.6 ± 0.85 7.4 ± 3.94 3.5 ± 0.82
  1. Abbreviations: IC50, inhibitory concentration 50%; R2, nonlinear correlation coefficient
  2. aNo statistically significant difference between positive control and treatments
  3. bSignificant difference between positive control or treatments with negative control (ANOVA, followed by Tukey test; P < 0.05)