Efficacy of entomopathogenic nematodes against Spodoptera littoralis (Boisd.) and Agrotis ipsilon (H.) (Lepidoptera: Noctuidae)

Egyptian Journal of Biological Pest Control

Table 2 Efficacy of different concentrations of the entomopathogenic nematode Steinernema monticolum against larval instars of Agrotis ipsilon in the laboratory

Nematode concentrations	Mean % mortality of larval instars at different exposure times
IJs/dish	2nd instar				3rd instar				4th instar				5th instar				6th instar
	24 h	48 h	72 h	Average	24 h	48 h	72 h	Average	24 h	48 h	72 h	Average	24 h	48 h	72 h	Average	24 h	48 h	72 h	Average
50	6.67	15.55	51.11	24.44	24.44	35.55	35.56	31.85	4.44	33.33	46.67	28.15	0	2.22	6.66	2.96	0	17.77	26.66	14.81
100	38.63	50	59.09	49.24	45.45	70.45	81.81	65.90	22	66.66	73.33	53.99	0	20	33.33	17.77	0	22.22	28.88	17.03
200	51.11	57.77	68.88	59.25	55.55	66.66	73.33	65.18	28.88	44.44	82.22	51.85	0	37.77	53.33	30.37	0	35.55	48.88	28.14
400	62.22	68.88	73.33	68.14	77.77	88.88	95.55	87.4	37.77	75.55	95.55	69.63	2.22	35.55	55.55	31.11	6.66	37.77	55.55	33.33
800	77.77	97.77	100	91.84	95.55	100	100	98.52	37.77	95.55	100	77.77	2.32	58.13	76.74	45.73	13.95	25.58	41.86	27.13
1600	80	95.55	100	91.85	95.55	100	100	98.52	71.11	95.55	100	88.88	11.35	61.36	81.81	51.51	13.95	58.13	81.39	51.16
F value	35.72				53.67				15.56				5.39				6.83
LSD	13.694				11.049				17.29				24.207				15.792