Direct infection of Spodoptera litura by Photorhabdus luminescens encapsulated in alginate beads.
J Invertebr Pathol
; 93(1): 50-3, 2006 Sep.
Article
en En
| MEDLINE
| ID: mdl-16828112
ABSTRACT
Actively growing cultures of Photorhabdus luminescens were encapsulated in sodium alginate beads and examined for their ability to infect insect hosts. These beads, containing approximately 2.5 x 10(7)Photorhabdus cells per bead, when mixed with sterilized soil and exposed to Spodoptera litura larvae resulted in 100% mortality in 48 h, while the use of alginate encapsulated Heterorhabditis nematode resulted in 40% mortality after 72 h. The bacteria were reisolated from the dead insect thus proving Koch's postulates and demonstrating the ability of P. luminescens to kill the insect host on their own, independent of the symbiont nematode. The LC(50) dose of Photorhabdus cells was estimated at 1010 cells per larva for killing S. litura 6th instar larvae in 48 h.
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Banco de datos:
MEDLINE
Asunto principal:
Spodoptera
/
Photorhabdus
/
Larva
Límite:
Animals
Idioma:
En
Revista:
J Invertebr Pathol
Año:
2006
Tipo del documento:
Article