Here it grows in haemocoel
and produces toxins ultimately resulting to the insect's mortality.
The nematodes we have found belong to the superfamily Sphaerularioidea Lubbock, 1861 (Poinar 1975), having two types of generations: on the one hand, we have a free-living, fungus feeding, and the other hand, another one involving a heterosexual female parasitic in insect haemocoel
, or free-living fungus feeding generation cycle absent or unknown (Nickle 1967).
Furthermore the transfer and delivery mechanism of Photorhabdus into the haemocoel
suggests to existence of virulence factors with novel tissues as targets in the lepidopteran pests that can be further investigated.
Bacteria are transmitted into the haemocoel
of the host insects by a developmentally-arrested third juvenile stage, the infective juvenile.
Well-concentrated, connectives and commissures indistinct; total nerve ring volume ~1/20 of haemocoel
. No distinction between pleural and cerebral ganglia (ee).