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Table 1 Larval mortality (LM) and larval repellency (Rep) effects of T. vulgaris EO and nano EO, Thymol and p-cymene on R. sanguineus larva. The results are represented as Mean ± SEM

From: The acaricidal and repellent activity of the essential and nano essential oil of Thymus vulgaris against the larval and engorged adult stages of the brown dog tick, Rhipicephalus sanguineus (Acari: Ixodidae)

Substance

Concentrations

Effect*

0.125%

0.25%

0.5%

1%

2%

4%

T. vulgaris EO

LM

1.1 ± 1.0 a

6.1 ± 2.3 a

8.4 ± 4.03 ab✦

95.3 ± 2.1 b✦✦

100 b✦✦

100 b✦✦

 

Rep

1.6 ± 0.2

1.8 ± 0.2

1.8 ± 0.2

2 ± 0.0

2.2 ± 0.2

2.8 ± 0.2

T. vulgaris

Nano

LM

88.9 ± 3.4 b✦✦

98.7 ± 0.8 b✦✦

100 b✦✦

100 b✦✦

100 b✦✦

100 b✦✦

Rep

2.6 ± 0.2

2.8 ± 0.2

3 ± 0.0

2.2 ± 0.2

3 ± 0.0

3 ± 0.0

  

2.5 †

5

10

20

40

60

Thymol

LM

3.3 ± 0.8 a

14.4 ± 1.5 b✦

100 c✦✦

100 c✦✦

100 c✦✦

NE

 

Rep

1 ± 0.0

2 ± 0.0

2 ± 0.0

3 ± 0.0

3 ± 0.0

-

P-cymene

LM

1.34 ± 0.3 a

0.6 ± 0.3 a

3.3 ± 1.2 a

5.8 ± 1.3 ab✦

6.2 ± 1.1 ab✦

86.9 ± 3.6 b✦✦

 

Rep

1.4 ± 0.2

2.2 ± 0.2

2 ± 0.0

2.2 ± 0.2

NE

NE

  1. *The control value for larval mortality was 0.85 ± 0.4. All data in each group compared to the control value. Note that different letters in each row shows the significance of difference (✦ refers to p < 0.05 and ✦✦ point to p < 0.01)
  2. † The values are represented as mg/ml for thymol and µl/ml for p-cymene