Table 11 Toxicity of nanoemulsions of Rheum rhabarbarum and Aloe vera post-treatment of Hyalomma dromedarii males three days post-treatment.

From: Novel acaricidal and growth-regulating activity of Aloe vera and Rheum rhabarbarum extracts and their oil/water nanoemulsions against the camel tick, Hyalomma dromedarii

Plant extract

Aloe vera

Rheum rhabarbarum

LC50

Lower

upper

LC90

Lower

upper

LC95

Lower

upper

LC50

Lower

upper

LC90

Lower

upper

LC95

Lower

upper

 

4.2

2.43–15.79

14.7

8.65

27.32

17.6

10.38

34.68

3.5

2.86

15.82

13.6

7.84

16.66

17.4

9.49

12.45

Chi

20.568

22.273

  

Degree of freedom (df)

3

3

Significance

0.001a0

0.000a

Regression equation

Y = 0.65 + 0.13xX

Y = 0.58 + 0.13xX

R squared (R2)

0.574

0.562

Relative toxicity

1.0

1.2

Toxicity index

83.3

100

Reference

Aloe vera

Relative toxicity before and after nanoformulations

(Reference: values before formulations)

LC50

LC90

LC95

LC50

LC90

LC95

2.3

1.5

1.5

2.5

1.6

1.4

  1. Concentration:
  2. Relative toxicity = LC50 of the least toxic compound/LC50 of the tested compound.
  3. Toxicity index = LC50 of the most toxic compound × 100/LC50 of the tested compound.