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Egyptian Journal of Biological Pest Control

Table 4 Summary of probit analysis of binomial proportion and calculated lethal concentration of concentration–mortality response (LC50 and LC90)

From: Comparative effectiveness of bioassay methods in identifying the most virulent entomopathogenic fungal strains to control Bemisia tabaci (Gennadius) (Hemiptera: Aleyrodidae)

EPF isolates

LC50 (95% FL)a

LC90 (95%FL)b

Intercept ± SEc

Slope ± SE

χ2d (df = 3)

P value (χ2)

C. javanica-089

0.22 × 104 (0.11 × 104–0.34 × 104)

0.99 × 108 (0.87 × 108–1.12 × 108)

4.19 ± 2.12

2.47 ± 0.33

65.99

< 0.001

C. javanica-102

0.64 × 104 (0.59 × 104–0.69 × 104)

1.17 × 108 (1.05 × 108–1.28 × 108)

3.48 ± 3.62

2.73 ± 0.56

29.01

< 0.001

F. moniliforme-083

0.64 × 105 (0.59 × 105–0.69 × 105)

1.19 × 108 (1.07 × 108–1.32 × 108)

3.59 ± 3.56

2.56 ± 0.55

49.02

< 0.001

C. javanica-099

1.01 × 106 (0.89 × 106–1.32 × 106)

1.71 × 108 (1.44 × 108–1.99 × 108)

3.24 ± 5.27

2.44 ± 0.72

130.45

< 0.001

M.anisopliae-1299

0.64 × 105 (0.59 × 105–0.68 × 105)

1.12 × 108 (1.02 × 108–1.22 × 108)

3.42 ± 3.61

2.83 ± 0.56

47.79

< 0.001

B. bassiana-409

2.44 × 106 (1.35 × 106–3.54 × 106)

4.18 × 108 (2.08 × 108–6.28 × 108)

3.03 ± 8.49

2.12 ± 0.93

178.20

< 0.001

B. bassiana-4565

0.65 × 105 (0.55 × 105–0.75 × 105)

1.78 × 108 (1.32 × 108–2.25 × 108)

4.06 ± 3.24

1.85 ± 0.51

69.65

< 0.001

B. bassiana-4511

0.52 × 104 (0.48 × 104–0.57 × 104)

1.01 × 108 (0.93 × 108–1.10 × 108)

3.69 ± 3.01

2.74 ± 0.48

36.52

< 0.001

B. bassiana-6097

4.91 × 106 (0.6 × 106–10.48 × 106)

8.74 × 108 (1.72 × 108–19.20 × 108)

3.12 ± 9.78

1.89 ± 0.99

147.53

< 0.001

B. bassiana-4543

0.99 × 106 (0.89 × 106–1.10 × 106)

1.61 × 108 (1.39 × 108–1.82 × 108)

3.02 ± 5.06

2.81 ± 0.70

323.48

< 0.001

  1. Values are means of two experiments with three replications for each EPF isolates with each concentration against 50 whitefly nymphs in each replicate. The experiment was repeated twice on different occasions, each time 10 EPF isolates with five concentrations (1 × 104 to 1 × 108 conidia ml−1) for each isolate
  2. aThe concentrations presented are conidia ml−1 and whitefly nymphs (second to third nymphal instars)
  3. bFL = fiducial limits; DF = number of terms (i.e., concentrations) used for the regression minus
  4. cSE = standard error of the fungal concentrations
  5. dLikelihood ratio χ2 test statistic indicates a satisfactory goodness-of-fit of empirical data compared to the estimated regression line
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