Table 4 Effect of Cinnamomum camphora, Matricaria chamomilla, Mentha arvensis, and Trigonella foenum-graecum leaf extracts and Aerosil 200® on the total chlorophyll, phenol, and protein concentrations (mg/g) in onion plants after 10 days of spray application

Control

1.08^c

2.15^d

50.88^d

C. camphora 4000 ppm

1.20^b

4.65^b

67.50^b

C. camphora 8000 ppm

1.35^a

6.75^a

77.40^a

M. chamomilla 4000 ppm

1.09^c

3.15^c

58.65^c

M. chamomilla 8000 ppm

1.17^b

4.78^b

64.40^b

M. arvensis 4000 ppm

0.93^e

3.15^c

54.45^c

M. arvensis 8000 ppm

1.09^c

4.21^b

60.35^b

T. foenum-graecum 4000 ppm

1.01^d

2.85^d

57.75^c

T. foenum-graecum 8000 ppm

1.07^c

4.10^b

63.15^b

Aerosil 200® 2 ml/l

1.11^c

3.70^c

47.47^e

Aerosil 200® 4 ml/l

1.18^b

5.80^a

35.25^e

LSD (Least significant difference)

0.6

1.25

4.25