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Table 1 Insecticidal activities of 14 entomopathogenic bacteria (EPB) of Xenorhabdus and Photorhabdus against L5 larvae of S. exigua. Larvae were hemocoelically injected with different doses of freshly cultured bacteria. Before injection, larvae were surface sterilized with 70% ethanol. For each test dose, 10 larvae were used with three replications

From: Virulent secondary metabolites of entomopathogenic bacteria genera, Xenorhabdus and Photorhabdus, inhibit phospholipase A2 to suppress host insect immunity

EPBa

LD50 (cfu/larva)

(95% CI)

Slope ± SE

df

χ2

Ptt

168.8 (110.4–318.3)

0.87 ± 0.27

1

0.817

Xh

179.2 (156.9–345.6)

0.77 ± 0.29

2

0.953

Xn F

216.9 (114.6–406.8)

0.82 ± 0.27

2

0.906

Xb

222.4 (120.3–432.7)

0.77 ± 0.28

2

0.835

Xn M

244.3 (147.5–480.4)

0.87 ± 0.26

2

0.959

Pl 193

244.3 (128.6–487.3)

0.87 ± 0.26

2

0.959

Pl laum

274.8 (150.3–512.6)

0.74 ± 0.29

2

0.985

Xn SK2

274.9 (151.4–523.2)

0.74 ± 0.29

2

0.985

Pl thra

282.87 (148.8–551.4)

0.97 ± 0.24

2

0.911

Xn 12,145

360.7 (201.7–680.4)

0.85 ± 0.26

2

0.849

Xn K1

550.9 (296.8–1079.8)

0.64 ± 0.32

1

0.879

Xn SK1

552.3 (294.2–1089.5)

0.64 ± 0.32

2

0.987

Xp

556.9 (289.5–1069.5)

0.64 ± 0.32

1

0.784

Xe

641.3 (346.4–1192.7)

0.66 ± 0.31

1

0.964

  1. aEPBs include Photorhabdus temperata Ssp. temperata ANU101 (‘Ptt’), Xenorhabdus hominickii ANU101 (‘Xh’), X. nematophila France (‘XnF’), X. bovienii (‘Xb’), X. nematophila Mexico (‘XnM’), Photorhabdus luminescens KACC12123 (‘Pl 193’), P. luminescens subsp. laumondii KACC12283 (‘Pl laum’), X. nematophila SK2 (‘XnSK2’), P. luminescens subsp. thracensis KACC12284 (‘Pl thra’), X. nematophila KACC12145 (‘Xn12145’), Xenorhabdus nematophila K1 (‘XnK1’), X. poinarii (‘Xp’), and X. ehlersii KSY (‘Xe’)