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Table 1 Interactions between fungal isolates and Steinernema feltiae against adults of Cosmopolites sordidus

From: Susceptibility of Cosmopolites sordidus (Germar) (Coleoptera: Curculionidae) to Heterorhabditis sp. (Poinar), Steinernema feltiae (Filipjev) and isolates of entomopathogenic fungi

Treatments

Concentrations (IJ-con/ml)

Observed mortality (%)

Expected mortality (%)

X2

Type of interaction

M1 + S

1000 + 5 × 107

20

30.6

3.7

Additive

M2 + S

1000 + 5 × 107

20

30.6

3.7

Additive

M3 + S

1000 + 5 × 107

20

42.2

11.7

Antagonistic

M4 + S

1000 + 5 × 107

20

42.2

11.7

Antagonistic

B1 + S

500 + 5 × 107

20

75.1

40.4

Antagonistic

B2 + S

1000 + 5 × 107

33.3

48

4.5

Antagonistic

B3 + S

1000 + 5 × 107

66.7

59.5

0.9

Additive

B4 + S

1000 + 5 × 107

40

53.8

3.5

Additive

B5 + S

1000 + 5 × 107

20

86.6

51.2

Antagonistic

B6 + S

1000 + 5 × 107

53

59.3

0.7

Additive

B7 + S

1000 + 5 × 107

33.3

48

4.5

Antagonistic

B8 + S

1000 + 5 × 107

26.7

30.6

0.5

Additive

B9 + S

1000 + 5 × 107

40

53.8

3.5

Additive

B10 + S

1000 + 5 × 107

46.7

48

0

Additive

B11 + S

1000 + 5 × 107

33.3

42.2

1.9

Additive

B12 + S

1000 + 5 × 107

53.3

42.2

2.9

Additive

B13 + S

1000 + 5 × 107

40

88.4

26.5

Antagonistic

B14 + S

1000 + 5 × 107

93.3

56.7

23.7

Synergistic

B15 + S

1000 + 5 × 107

40

53.8

3.5

Additive

B16 + S

1000 + 5 × 107

40

48

1.3

Additive

B17 + S

1000 + 5 × 107

33.3

48

4.5

Antagonistic

B18 + S

1000 + 5 × 107

46.7

53.8

0.9

Additive

B19 + S

1000 + 5 × 107

13.3

36.4

14.6

Antagonistic

B20 + S

1000 + 5 × 107

20

42.2

11.7

Antagonistic

B21 + S

1000 + 5 × 107

20

42.2

11.7

Antagonistic

B22 + S

1000 + 5 × 107

33.3

48

4.5

Antagonistic

B23 + S

1000 + 5 × 107

13.3

30.6

9.8

Antagonistic

B24 + S

1000 + 5 × 107

0

30.6

30.6

Antagonistic

B25 + S

1000 + 5 × 107

13.3

42.2

19.8

Antagonistic

B26 + S

1000 + 5 × 107

0

30.6

30.6

Antagonistic

Control

 

0

0

  
  1. aX2: Chi-square test
  2. bExpected mortality ME = MN + MF (1 − MN) where MN and MF are the observed proportional mortalities relatively caused by nematodes and fungi