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 6 The mortality rates of Tuta absoluta larvae in contact and oral efficacy bioassay of cell-free supernatants of symbiotic bacteria

Symbiotic bacteria	Larval stages	Moratality rates (%) after treatment
Symbiotic bacteria	Larval stages	24 h	48 h	72 h
Contact
X. b. MCB-8	1st/2nd	5.0A^a	35.0AB^b	80.0A^c
P. l. AVB-15		15.0B^a	45.0B^b	65.0B^c
X. b. KBC-4		2.5A^a	25.0A^b	55.0B^c
X. b. MCB-8	3rd/4th	0.0A^a	30.0A^b	55.0A^c
P. l. AVB-15		5.0A^a	22.5AB^b	47.5A^b
X. b. KBC-4		0.0A^a	12.5B^b	45.0A^b
Oral
X. b. MCB-8	1st/2nd	5.0A^a	27.5A^b	40.0A^b
P. l. AVB-15		2.5A^a	32.5A^b	40.0A^b
X. b. KBC-4		0.0A^a	20.0A^b	27.5B^b
X. b. MCB-8	3rd/4th	0.0A^a	12.5A^b	22.5A^b
P. l. AVB-15		5.0A^a	17.5A^b	22.5A^b
X. b. KBC-4		0.0A^a	10.0A^b	17.5A^b

*KBC-4 and MCB-8: Xenorhabdus bovienii, AVB-15: Photorhabdus luminescens subsp. kayaii. ^aDifferent capital letters show statistically significant differences among symbiotic bacteria 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)