Table 7 Pathogenicity parameters of Metarhizium rileyi incorporated with indoxacarb (0.72 ppm) to 2nd and 3rd larval instars of Helicoverpa armigera at 7 days of treatment

Reg. equation

Y = 0.47X − 1.97

Y = 0.36X − 1.97

χ² calculated

0.20

1.65

χ² tabulated

7.81

9.48

LC₅₀ (conidia/ml)

1.37 × 10⁴

3.06 × 10⁵

Fiducial limits (conidia/ml)

4.62 × 10³ and 4.35 × 10⁴

8.14 × 10⁴ and 1.16 × 10⁶

LC₉₀ (conidia/ml)

6.73 × 10⁶

1.11 × 10⁹

Fiducial limits (conidia/ml)

1.02 × 10⁶ and 2.46 × 10⁸

1.07 × 10⁸ and 9.35 × 10¹⁰