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Table 6 Effect of the tested insecticides on certain antioxidant enzymes of tomato plants

From: Comparative toxicity of new insecticides generations against tomato leafminer Tuta absoluta and their biochemical effects on tomato plants

Enzyme activity ± SD (U/g fresh weight/h)

Insecticides

Days after treatment

Before spray

One

Three

Five

Seven

Super oxide dismutase

Challenger

582.00 ± 17.0

468.67 ± 29.7b

444.00 ± 24.0b

426.67 ± 29.7b

401.33 ± 5.7b

Coragen

595.0 ± 24.0

433.00 ± 7.10c

400.0 ± 28.3cd

362.0 ± 31.1c

345.0 ± 18.4d

Emperor

576.0 ± 39.6

412.20 ± 33.9c

379.0 ± 18.4d

359.0 ± 15.6c

336.0 ± 11.3d

Radiant

584.0 ± 25.5

468.00 ± 14.1b

458.0 ± 11.3b

410.0 ± 17.0b

380.0 ± 11.3c

Vapcomic

556.0 ± 11.3

426.00 ± 5.70c

417.0 ± 4.2c

401.0 ± 26.9b

384.0 ± 8.5c

Control

582.0 ± 20.0

554.00 ± 17.6a

562.0 ± 42.5a

582.0 ± 32.3a

588.0 ± 22.7a

LSD0.05

NS

24.72

22.19

32.15

16.41

Catalase

Challenger

37.31 ± 2.63

29.87 ± 2.45b

25.84 ± 2.35b

19.59 ± 2.51b

19.19 ± 2.74b

Coragen

34.30 ± 0.79

24.50 ± 2.72c

18.51 ± 1.09c

14.70 ± 0.54c

13.61 ± 0.54d

Emperor

36.47 ± 1.63

23.41 ± 1.63c

16.33 ± 1.09c

14.15 ± 1.08c

11.43 ± 0.54d

Radiant

38.11 ± 1.09

28.31 ± 2.18c

25.04 ± 2.18b

19.60 ± 1.09b

16.33 ± 1.09bc

Vapcomic

37.56 ± 1.63

25.59 ± 2.65c

23.41 ± 2.72b

19.05 ± 1.64b

16.88 ± 1.63c

Control

37.02 ± 2.18

40.83 ± 0.77a

37.56 ± 0.77a

34.84 ± 3.08a

39.20 ± 1.54a

LSD0.05

NS

3.56

3.48

3.07

2.63

Polyphenol oxidase

Challenger

41.65 ± 1.47

34.24 ± 10.3b

31.73 ± 22.4b

23.25 ± 1.7b

20.80 ± 6.8b

Coragen

46.80 ± 7.4

29.52 ± 0.6bc

22.08 ± 6.6b

13.52 ± 0.6c

9.12 ± 0.5c

Emperor

45.60 ± 7.0

27.76 ± 0.6c

21.12 ± 2.0b

10.32 ± 2.4c

8.48 ± 1.8c

Radiant

46.80 ± 1.5

34.64 ± 1.7b

28.56 ± 1.9b

20.08 ± 1.2b

11.12 ± 0.8c

Vapcomic

46.80 ± 5.5

32.32 ± 2.7bc

26.08 ± 0.9b

20.64 ± 7.0b

11.04 ± 1.6c

Control

42.72 ± 2.9

51.04 ± 1.6a

68.64 ± 1.1a

71.36 ± 5.7a

71.76 ± 7.8a

LSD0.05

NS

5.85

18.52

5.86

7.64

Glutathione-S-transferase

Challenger

79.99 ± 5.1bc

63.74 ± 2.0b

58.61 ± 10.8b

54.12 ± 68b

50.24 ± 8.2b

Coragen

76.86 ± 2.2c

56.80 ± 1.3c

47.24 ± 0.7c

41.24 ± 3.0c

38.06 ± 0.2c

Emperor

76.86 ± 4.5c

50.99 ± 1.9d

45.55 ± 0.9c

40.12 ± 2.2c

37.49 ± 2.6c

Radiant

78.55 ± 4.7bc

62.43 ± 2.1b

52.49 ± 0.4bc

49.87 ± 1.9b

42.18 ± 2.1c

Vapcomic

83.99 ± 1.9b

56.05 ± 2.4c

52.30 ± 2.8bc

50.24 ± 2.2b

42.37 ± 1.9c

Control

93.73 ± 1.5a

93.73 ± 3.4a

110.79 ± 0.8a

112.48 ± 0.5a

114.92 ± 1.9a

LSD0.05

6.46

4.02

8.16

6.04

6.63

  1. L.S.D0.05 least significant difference at 0.05 level of probability; N.S not significant difference at 0.05 level of probability; Means accompanied by the same letter in a column are not significantly different at 0.05 level of probability