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Table 3 The effects of T. vulgaris oils and its major constituents on adult females of R. sanguineus. The egg reproductive index (RI) and percent reduction of Oviposition (OR) values 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)

 

Concentrations

Substance

index

0.5%

1%

1.5%

2%

4%

T. vulgaris EO

RI *

49.08 ± 2.5 a

45.4 ± 3.2 a

54.1 ± 1.3 a

53.1 ± 1.9 a

45.4 ± 6.9 a

 

OR

9.6

16.4

0.36

2.2

16.4

T. vulgaris

Nano

RI

44.5 ± 1.5 a

46.0 ± 7.3 a

NE

39.3 ± 5.9 a

43.9 ± 9.3 a

OR

18.0

15.3

–-

27.6

19.1

  

2.5 mg/ml

5 mg/ml

10 mg/ml

20 mg/ml

40 mg/ml

Thymol

RI

51.1 ± 2.9 a

48.4 ± 2.1a

44.5 ± 2.7 a

29.9 ± 4.2 b✦

29.9 ± 5.1 b✦

 

OR

5.8

10.8

18.0

44.9

44.9

P-cymene

RI

45.4 ± 2.88 a

43.7 ± 3.9 a

47.9 ± 1.3 a

42.1 ± 3.3 a

43.6 ± 3.7 a

 

OR

16.4

19.5

11.7

22.4

19.7

  

3.75 mg/ml

7.5 mg/ml

15mg/ml

  

Cypermethrin

RI

0.00 c✦✦

18.3 ± 10.1 b✦

24.6 ± 15.7 b✦

  

(Positive control)

OR

100 (0/6)

66.3 (3/6)

54.7 (2/6)

  
  1. *The control value for RI was 54.3 ± 3.2. 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. In each cypermethrin group, this sign indicates to “the number of ticks produced eggs /all examined engorged females”