Efficacy of the entomopathogenic fungus, Metarhizium anisopliae (Metsch.), against larvae of the cotton leafworm, Spodoptera littoralis (Boisd.) (Lepidoptera: Noctuidae), under laboratory conditions

Egyptian Journal of Biological Pest Control

Table 1 Mortality % of Spodoptera littoralis (L₃ and L₅) treated with different concentrations of Metarhizium anisopliae conidiospores

Concentration/ml	Larval instar	Mortality % in days post-treatment
Concentration/ml	Larval instar	1	2	3	4	5	6	7	8	9	10
2 × 10¹	L₃	0	0	0	0	0	0	2	2	2	2
2 × 10¹	L₅	0	0	0	0	0	0	0	0	0	0
2 × 10²	L₃	0	0	0	0	4	4	4	4	4	4
2 × 10²	L₅	0	0	0	0	0	0	0	0	0	0
2 × 10³	L₃	0	0	0	8	8	10	14	14	14	14
2 × 10³	L₅	0	0	0	2	2	6	6	6	6	6
2 × 10⁴	L₃	0	0	0	16	30	44	52	52	52	52
2 × 10⁴	L₅	0	0	0	10	22	30	40	50	60	60
2 × 10⁵	L₃	0	0	0	20	42	58	66	66	66	66
2 × 10⁵	L₅	0	0	0	14	38	44	70	70	70	70
2 × 10⁶	L₃	0	0	0	38	50	70	88	88	88	88
2 × 10⁶	L₅	0	0	0	30	46	68	78	78	78	78
2 × 10⁷	L₃	0	0	0	44	70	90	90	90	90	90
2 × 10⁷	L₅	0	0	0	48	92	92	92	100
Control	L₃	0	0	0	0	0	0	0	0	0	0
Control	L₅	0	0	0	0	0	0	0	0	0	0