Treatments

Amylase

Invertase

Trehalase

Chitinase

Enzyme activity (Mean± S. E**)
at the indicated tested times

Enzyme activity (Mean± S. E)
at the indicated tested times

Enzyme activity (Mean± S. E)
at the indicated tested times

Enzyme activity (Mean± S. E)
at the indicated tested times

3days

7days

3days

7days

3days

7days

3days

7days

mg/glucose/
min./g b.wt

*%

mg glucose/
min./g b.wt

*%

mg glucose/
min./g b.wt

*%

mg glucose/
min./g b.wt

*%

mg glucose/
min./g .wt

*%

mg glucose/
min./g b.wt

*%

mg AChBr/
min./g b.wt

*%

mg AChBr/
min./g b.wt

*%

Dipel DF

578.8±11.4b

88.8

784.0±15.5b

92.0

1398.9±200.3a

81.87

1302.1±156.4a

84.9

654.4±39.1c

73.6

910.4±21.0a

83.7

56.3±4b

108.6

65.3±2.7b

92.9

Protecto

624.1±11.1ab

95.9

833.2±18.7ab

97.8

1435.6±178.5a

84.02

1319.4±184.5a

86

860.3±22.7a

96.8

1058.7±82.3a

97.4

47.9±3.2b

92.5

68.9±3.3b

98.1

Bioranza

610.5±11.6ab

93.9

807.6±16.0ab

94.8

1584.2±214.8a

92.71

1473.8±134.6a

96.1

873.3±12.9a

98.3

1099.5±77.7a

101.1

54.5±3.4b

105.1

74.3±3.1b

105.7

Chlorfluazuron

402.3±9.8d

61.9

510.1±13.4d

59.9

1507.7±191.1a

88.23

1286.7±150.6a

83.9

747.4±27.0b

84.1

939.4±19.6a

86.4

67.4±2.6a

130.0

86.2±4a

122.6

Pyriproxyfen

480.6±15.7c

73.8

595.5±12.7c

69.9

1286.3±176.4b

75.28

1229.4±97.7a

80.1

858.6±20.9a

96.6

1037.2±55.6a

95.4

73.5±2.5a

141.9

92.50±4.1a

131.6

Control

650.4±24.9a

100

852.2±19.4a

100

1708.7±163.9a

100

1534.2±157.3a

100

888.6±22.7a

100

1087.1±62.1a

100

51.8±2.3b

100

70.3±3.6b

100

L.S.D0.05

46.199**

49.789**

380.100**

359.755ns

78.462**

249.822ns

9.403**

10.799**

P values

0.0000

0.0000

0.0095

0.6772

0.0002

0.4863

0.0005

0.0008

*Activity %= percentage relative to control.
**SE = Standard Error
***Means under each variety sharing the same letter in a column are not significantly different at P<0.05.

Table 3: Changes in the activity of some enzymes in the supernatant of the homogenated H. armigera larvae as affected by tested insecticides.