Table 3 Effects (mean percentage ± SE) of different concentrations of essential oils on inhibition of larval development of H. contortus

3.0

–

100.0 ± 0.0^a,b

95.3 ± 1.84^a,b

1.5

100.0 ± 0.0^a,b

100.0 ± 0.0^a,b

89.8 ± 0.88^b

0.75

100.0 ± 0.0^a,b

97.2 ± 2.26^a,b

81.4 ± 1.83^b

0.375

90.1 ± 1.68^b

86.4 ± 2.34^b

64.2 ± 1.79^b

0.187

85.4 ± 2.62^b

67.1 ± 3.26^b

35.9 ± 0.98^b

0.0937

71.5 ± 1.35^b

46.9 ± 1.18^b

11.5 ± 0.95

0.0468

61.8 ± 1.16^b

31.3 ± 2.81^b

12.0 ± 2.83

0.0234

41.2 ± 0.81^b

27.4 ± 1.61^b

9.9 ± 2.02

0.0117

14.7 ± 1.81^b

20.5 ± 1.28^b

8.8 ± 1.44

0.0058

10.8 ± 0.35

12.4 ± 1.17

6.3 ± 0.64

0.0029

9.1 ± 0.59

–

–

IC₅₀ = 0.044 mg/ml

IC₅₀ = 0.117 mg/ml

IC₅₀ = 0.280 mg/ml

R² = 0.983

R² = 0.989

R² = 0.994

Levamisol (20 mg/ml)

99.8 ± 0.21^b

99.8 ± 0.21^b

99.8 ± 0.21^b

DMSO (1%)

9.3 ± 2.16

7.8 ± 0.72

7.5 ± 3.17