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
| 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 |
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’)