Efficacy of some native entomopathogenic nematodes against the alfalfa weevil, Hypera postica (Gyllenhal) (Coleoptera: Curculionidae), and the lucerne beetle, Gonioctena fornicata (Brüggemann) (Coleoptera: Chrysomelidae), adults under laboratory conditions

Egyptian Journal of Biological Pest Control

Table 6 Lethal time (LT₃₀, LT₅₀, and LT₉₀) values of treated isolates against adults of Hypera postica (hour)

Isolates	Slope ± SE	LT₃₀ (95% fiducial limit)	LT₅₀ (95% fiducial limit)	LT₉₀ (95% fiducial limit)	Heterogeneity
Steinernema carpocapsae (Black sea isolate)	3.869 ± 0.283	25.916 (22.380–29.113)	35.407 (31.790–38.848)	75.909 (68.501–86.031)	1.14
S. feltiae (isolate 09-31)	2.381 ± 0.249	45.810 (39.570–51.478)	76.074 (68.288–85.999)	262.756 (202.900–384.894)	0.77
Heterorhabditis bacteriophora (isolate 09-43)	4.424 ± 0.809	121.745 (109.212–147.749)	159.954 (135.437–222.873)	311.667 (223.473–624.159)	0.43
H. bacteriophora Tokat-Songut	4.341 ± 0.683	108.901 (99.625–124.271)	143.823 (125.686–182.167)	283.818 (213.812–481.143)	0.87
S. carpocapsae Tokat-Ulas	5.073 ± 0.376	29.840 (26.880–32.501)	37.858 (34.967–40.629)	67.729 (62.496–74.601)	0.95