Effect of the fungus, Beauveria bassiana (Balsamo) Vuillemin, on the beet armyworm, Spodoptera exigua (Hübner) larvae (Lepidoptera: Noctuidae), under laboratory and open field conditions

Egyptian Journal of Biological Pest Control

Table 1 Mortality (%) of Spodoptera exigua (L₃ and L₄) treated with different concentrations of Beauveria bassiana conidiospores

Concentration/ml	Larval instars	Mortality (%) in days post treatment
Concentration/ml	Larval instars	1	2	3	4	5	6	7	8	9	10
2 × 10¹	L₃	0	0	0	0	11	11	15	24	30	40
2 × 10¹	L₄	0	0	0	0	5	6	12	18	25	33
2 × 10²	L₃	0	0	0	5	15	30	30	50	70	90
2 × 10²	L₄	0	0	0	5	12	21	26	41	58	78
2 × 10³	L₃	0	0	0	10	17	32	43	62	98	100
2 × 10³	L₄	0	0	0	7	13	23	30	51	80	91
2 × 10⁴	L₃	0	0	0	16	41	62	80	91	100
2 × 10⁴	L₄	0	0	0	10	30	50	70	80	90	98
2 × 10⁵	L₃	0	0	0	22	46	68	98	100
2 × 10⁵	L₄	0	0	0	15	42	61	80	96	100
2 × 10⁶	L₃	0	0	0	30	70	90	100
2 × 10⁶	L₄	0	0	0	25	65	86	94	100
2 × 10⁷	L₃	0	0	0	42	80	100
2 × 10⁷	L₄	0	0	0	30	75	98	100
Control	L₃	0	0	0	0	0	0	0	0	0	0
Control	L₄	0	0	0	0	0	0	0	0	0	0