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Egyptian Journal of Biological Pest Control

Table 4 Student test for independent samples (P ≤ 0.05, n = 5) to compare the averages of the different treatments before and after rain simulation

From: Evaluation of a Bacillus thuringiensis isolate-based formulation against the pod borer, Helicoverpa armigera Hübner (Lepidoptera: Noctuidae)

Control periods

Treatments

DF

F

t (calculated)

t (tabulated)

Sig. (bilateral)

Average difference

Standard error difference

The confidence interval of the the difference at 95%

Inferior

Superior

2

Control

-

-

-

-

-

-

-

-

-

Water

8

0

0

1.86

1

0

0.447

− 1.031

1.031

Spinosad

-

-

-

-

-

-

-

-

-

Hr1

-

-

-

-

-

-

-

-

-

Formulation

-

-

-

-

-

-

-

-

-

3

Control

-

-

-

-

-

-

-

-

-

Water

8

0

0

1.86

1

0

0.707

− 1.631

1.631

Spinosad

-

-

-

-

-

-

-

-

-

Hr1

-

-

-

-

-

-

-

-

-

Formulation

-

-

-

-

-

-

-

-

-

4

Control

-

-

-

-

-

-

-

-

-

Water

8

0

0

1.86

1

0

1

− 2.306

2.306

Spinosad

-

-

-

-

-

-

-

-

-

Hr1

6

3.2

− 1.291

1.943

0.248

− 1

0.775

− 2.934

0.934

Formulation

6

3.2

− 1

6.315

0.357

− 0.5

0.5

− 1.729

0.729

5

Control

-

-

-

-

-

-

-

-

-

Water

8

0

0.62

1.86

0.553

0.5

0.806

− 1.377

2.377

Spinosad

8

10.894

− 6.147

1.86

P < 0.01*

− 2.3

0.374

− 3.163

− 1.437

Hr1

6

3.16

− 1.809

1.943

0.119

− 1.2

0.663

− 2.813

0.413

Formulation

7

0

− 1.291

1.895

0.237

− 0.5

0.387

− 1.411

0.411

6

Control

-

-

-

-

-

-

-

-

-

Water

7

0.293

11.496

1.895

P < 0.01*

6.12

0.532

4.872

7.368

Spinosad

4

4.696

− 5.715

2.132

P < 0.01*

− 2.8

0.49

− 4.16

− 1.44

Hr1

8

0.59

− 1.429

1.86

0.192

− 0.7

0.49

− 1.835

0.435

Formulation

8

0

0

1.86

1

0

0.447

− 1.031

1.031

7

Control

-

-

-

-

-

-

-

-

-

Water

8

0

0

1.86

1

0

1

− 2.306

2.306

Spinosad

4

4.696

− 5.715

2.132

P < 0.01*

− 2.8

0.49

− 4.16

− 1.44

Hr1

7

1.6

0

1.895

1

0

0.548

− 1.288

1.288

Formulation

8

0

0

1.86

1

0

0.316

− 0.729

0.729

8

Control

-

-

-

-

-

-

-

-

-

Water

7

0.289

− 0.788

1.895

0.455

− 0.7

0.889

− 2.775

1.375

Spinosad

4

4.696

− 5.715

2.132

P < 0.01*

− 2.8

0.49

− 4.16

− 1.44

Hr1

6

3.2

− 7

1.943

P < 0.01*

− 7

1

− 9.459

− 4.541

Formulation

8

0

0

1.86

1

0

0.316

− 0.729

0.729

9

Control

-

-

-

-

-

-

-

-

-

Water

8

0

− 5

1.86

P < 0.01*

− 5

1

− 7.306

− 2.694

Spinosad

4

4.696

− 5.715

2.132

P < 0.01*

− 2.8

0.49

− 4.16

− 1.44

Hr1

7

0.275

− 18.375

1.895

P < 0.01*

− 14.7

0.8

− 16.591

− 12.809

Formulation

7

0

− 1.291

1.895

0.237

− 0.5

0.387

− 1.411

0.411

10

Control

-

-

-

-

-

-

-

-

-

Water

7

0.526

− 2.449

1.895

P < 0.01*

− 1.8

0.735

− 3.515

− 0.085

Spinosad

4

4.696

− 5.715

1.86

P < 0.01*

− 2.8

0.49

− 4.16

− 1.44

Hr1

7

0.275

− 18.375

1.895

P < 0.01*

− 14.7

0.8

− 16.591

− 12.809

Formulation

7

0

− 1.291

1.895

0.237

− 0.5

0.387

− 1.411

0.411

  1. If t (calculated) > t (tabulated), then the samples means are not equal; if t (calculated) ≤ t (tabulated), then the sample means are equal.
  2. *P < 0.001 (highly significant) and P < 0.05 (significant); student test for independent samples at α = 0.05
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