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 3 Pathogenicity of a single dose of Mattesia sp. isolated from Laemophloeus turcicus adults versus different insects at indicated days post-treatment

Insect pest	Mortality (%) at indicated days post-treatment
Insect pest	15	22–23	27	32–37
Laemophloeus turcicus^a	46/200 (23)	53/200 (27)	64/200 (32)	200/200 (100)
Rhyzopertha dominica^a	43/250 (17)	137/250 (55)	185/250 (74)	202/250 (81)
Plodia interpunctella^c	79/300 (26)	107/300 (36)	121/300 (40)	157/300 (52)
Oryzaephilus surinamensis^a	0/60 (0)	0/60 (0)	0/60 (0)	0/60 (0)
Tenebrio molitor^c	0/200 (0)	0/200 (0)	0/200 (0)	0/200 (0)

^a:cRepresented in percentages of mortality among treated coleopterous adults: a, of ca. 4–5-week-old and lepidopterous or coleopterous larvae; c, of ca.7-to 10-day-old. Mortality in the controls ranged between 0 and 2%
0.01 g of powdered cadavers of Mattesia-infected adults of L. turcicus (100 cadavers) carried ca. 1.5 × 10⁸ spores per 10 g of crushed maize grain