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Table 4 In vitro antimicrobial activity of PTS and PTSO against phytopathogenic bacteria via the gas phase, expressed as the average diameter ± standard deviation of inhibition zone (mm)

From: PTS and PTSO, two organosulfur compounds from onion by-products as a novel solution for plant disease and pest management

Species

PTS (µg/µl)

PTSO (µg/µl)

5

10

25

5

10

25

E. persicina

19.0 ± 1.41

25.0 ± 3.16

40.8 ± 2.59

15.8 ± 2.59

22.3 ± 2.17

28.5 ± 2.69

X. campestris

42.8 ± 3.96

50.8 ± 2.59

59.3 ± 3.67

44.3 ± 3.11

54.5 ± 3.84

67.3 ± 3.03

P. savastanoi

16.3 ± 0.83

19.5 ± 1.66

26.8 ± 1.09

26.5 ± 1.12

36.3 ± 1.92

47.0 ± 1.41

P. syringae

0.0 ± 0.00

7.5 ± 1.66

13.3 ± 1.48

20.0 ± 1.41

23.5 ± 1.12

27.8 ± 1.48

C. m. michiganensis

15.0 ± 3.36

25.0 ± 1.41

40.5 ± 1.12

44.8 ± 2.86

55.0 ± 3.39

65.8 ± 1.92

A. tumefaciens

15.5 ± 2.18

26.5 ± 1.12

41.0 ± 2.55

49.5 ± 1.80

57.5 ± 2.69

60.5 ± 2.69