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Table 6 Antimicrobial activity of PTS and PTSO against phytopathogenic fungi by disk-diffusion method, 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

G. candidum

15.5 ± 1.80

26.0 ± 3.16

36.8 ± 3.34

27.3 ± 2.86

34.8 ± 3.11

44.8 ± 2.59

A. alternata

38.5 ± 3.35

44.8 ± 2.17

53.3 ± 2.05

30.8 ± 0.83

42.0 ± 2.12

56.3 ± 1.64

Phyllosticta spp

64.0 ± 1.41

68.8 ± 0.83

75.5 ± 1.12

55.0 ± 1.63

64.5 ± 2.05

79.5 ± 1.25

P. cinnamomi

28.5 ± 1.12

42.5 ± 3.64

54.0 ± 1.41

39.5 ± 2.69

52.0 ± 1.41

66.3 ± 2.59

F. oxysporum

26.5 ± 2.18

46.5 ± 1.66

60.5 ± 2.69

41.8 ± 3.03

51.3 ± 2.59

54.0 ± 1.41

F. graminearum

51.5 ± 2.06

58.0 ± 1.22

65.3 ± 2.17

50.8 ± 2.59

57.8 ± 0.83

69.0 ± 2.12

P. expansum

34.3 ± 3.03

39.8 ± 1.64

48.5 ± 1.50

35.8 ± 3.34

46.3 ± 0.83

54.8 ± 1.48

P. digitatum

15.8 ± 0.83

20.5 ± 0.50

34.0 ± 1.22

12.0 ± 2.55

18.5 ± 1.12

26.0 ± 1.22