Biocontrol potential of endosymbiotic bacteria of entomopathogenic nematodes against the tomato leaf miner, Tuta absoluta (Meyrick) (Lepidoptera: Gelechiidae)

Egyptian Journal of Biological Pest Control

Table 3 Mortality rates (%) of 1st/2nd and 3rd/4th instars of Tuta absoluta larvae 24, 48, and 72 h after application of different entomopathogenic nematode species/strains at the concentrations of 200 infective juveniles (IJs)/Petri

EPNs*	Larval stages	Moratality rates (%) after treatment
EPNs*	Larval stages	24 h	48 h	72 h
S. f. ÜKK-1	1st/2nd	2.5 A^aa^b	17.5 Ab	50.0 Ac
S. f. MKB-2		2.5 Aa	17.5 Ab	52.5 Ac
S. f. KBC-4		5.0 Aa	20.0 Ab	55.0 Ac
S. f. UTP-5		2.5 Aa	35.0 Bb	47.5 Ac
S. f. MCB-8		2.5 Aa	25.0 ABb	57.5 Ac
S. f. DDKY-11		12.5 Ba	27.5 ABb	52.5 Ac
S. f. MAY-12		2.5 Aa	27.5 ABb	50.0 Ac
S. f. ATB-13		2.5 Aa	35.0 Bb	52.5 Ac
S. f. DDKB-17		0.0 Aa	12.5 Aa	47.5 Ac
H. b. UMK-7		0.0 Aa	30.0 ABb	52.5 Ac
H. b. AVB-15		2.5 Aa	35.0 Bb	62.5 Ac
S. f. ÜKK-1	3rd/4th	17.5 ABa	42.5 Ab	75.0 Ac
S. f. MKB-2		27.5 Ba	45.0 Ab	77.5 ABc
S. f. KBC-4		0.0 Aa	57.5 Bb	90.0 Bb
S. f. UTP-5		22.5 ABa	57.5 Bb	70.0 Ac
S. f. MCB-8		22.5 ABa	40.0 Aa	90.0 Bc
S. f. DDKY-11		10.0 ABa	60.0 Bb	87.5 Bc
S. f. MAY-12		12.5 ABa	50.0 ABb	75.0 Ac
S. f. ATB-13		12.5 ABa	55.0 ABb	75.0 Ac
S. f. DDKB-17		10.0 ABa	50.0 ABb	80.0 ABc
H. b. UMK-7		25.0 Ba	60.0 Bb	75.0 Ab
H. b. AVB-15		25.0 Ba	62.5 Bb	85.0 ABc

*UKK-1, MKB-2, KBC-4, UTP-5, MCB-8, DDKY-11, MAY-12, ATB-13, DDKB-17: Steinernema feltiae; UMK-7 and AVB-15: Heterorhabditis bacteriophora. ^aDifferent capital letters show statistically significant differences among entomopathogenic nematode species/strains for each exposure time levels. ^bDifferent lowercase letters show statistically significant differences among the exposure time levels for each entomopathogenic nematode species (P ≤ 0.05, Tukey)