Productivity, pathogenicity, host range, and spore mass-propagation of local strain of Mattesia sp. isolated from insect cadavers of certain stored grain pests in Egypt

Egyptian Journal of Biological Pest Control

Table 6 Calculated parameters of the larvicidal activity of Mattesia spores for Plodia interpunctella 7–10-day-old larvae

Conc. gm/10 g crushed maize grain (approx. no. of Mattesia* spores)	LT₅₀ (days)	95% Fiducial limits		Slope
	LT₅₀ (days)	Lower (days)	Upper (days)	Slope
0.01 g (1.5 × 10⁸)	39.78	29.77	125.12	1.36
0.02 g (3 × 10⁸)	31.65	23.85	99.13	1.17
0.04 g (6 × 10⁸)	18.08	12.32	21.97	1.72
0.08 g (12 × 10⁸)	13.15	7.81	16.43	2.05
0.16 g (24 × 10⁸)	11.13	6.52	14.12	2.33
Days post-treatment	LC₅₀ (gm) (approx. no. of Mattesia spores)	95% Fiducial limits		Slope
Days post-treatment	LC₅₀ (gm) (approx. no. of Mattesia spores)	Lower	Upper	Slope
15	0.069	0.048	0.118	0.71
15	(10.35 × 10⁸)	(7.2–17.7 × 10⁸)
23	0.022	0.016	0.029	1.06
23	(3.3 × 10⁸)	(2.4–4.35 × 10⁸)
37	0.013	0.009	0.018	1.08
37	(1.95 × 10⁸)	(1.3–2.7 × 10⁸)

*Powdered cadavers of Laemophloeus turcicus adults (0.01 g ≃ 100 cadavers carried ca. 1.5 × 10⁸ Mattesia spores)