Bradynema listronoti

Bradynema listronoti	Contents	Rev: 02/21/2024
	Classification	Biology and Ecology
	Morphology and Anatomy	Life Cycle
Return to Bradynema Menu	Economic Importance	Ecosystem Functions and Services
	Distribution	Management
Return to Allantonematidae Menu	Feeding	References
	Go to Nemaplex Main Menu	Go to Dictionary of Terminology

Classification:


Bradynema listronoti Zeng, Giblin-Davis, Ye, Belair, Boivin & Thomas, 2007

    Synonyms:

Morphology and Anatomy:

Adult parasitic female:
- Size among species ranging from 1 to 12 mm length
- Cuticle smooth but lateral filed not apparent
- Female parsaitic with vestigial stylet
- Pharynnx, excretory pore and intestine degenerate or indistinct.
- Apparently nutrients absorbed directly from the host haemocoel
- Parasitic female body becomes very large with wide body.
- Vulva subterminal
- Monodelphic witk long reflexed ovary.
- Saccate uterus containing eggs and juveniles
- Widely rounded tail. no mucron.

Free-living female:

Body length 0.4 to 1 mm
Stylet absent or vestigial, without knobs if discernible.
Cuticle finely striated.
Head rounded, continuous with bodycontour.
Lateral field with six lines
Pharyngeal corpus subcylindroid, no valve. Pharyngeal glands present, dorsal gland longer than subventrals, both overlapping intestine.
Monodelphic, prodelphic.
Vulva at 80-90% of body length.
Well developed gonad which includes long usterus filled with sperm cells.
Tail short, rounded or cylindroid

Free-living male :

Body length 0.4 to 1 mm
Stylet absent or vestigial, without knobs if discernible.
Cuticle finely striated.
Head rounded, continuous with bodycontour.
Lateral field with six lines
Pharyngeal corpus subcylindroid, no valve. Pharyngeal glands present, dorsal gland longer than subventrals, both overlapping intestine.
Monorchic with well-developed testis conteining numerous sperm.
Spicules paired, thin; gubernaculum present
Bursa absent or present; peloderan whan present

Ref: Zeng et al., 2007

Reported median body size for this species (Length mm; width micrometers; weight micrograms) - Click:

Distribution:

Reported as a parasite of carrot weevils in Quebec, Canada

Economic Importance:

Potential as a biological control agent for carrot weevils

Life Cycle:

Ecophysiological Parameters:

For Ecophysiological Parameters for this species, click	If species level data are not available, click for genus level parameters

Ecosystem Functions and Services:

.Effectively, B. listronoti sterilizes its host by inhibiting the maturation of the reproductive system in females (Gagnon et al., 2019), and its potential as a biological control agent is currently investigated. (Note: use of the term "nematode castrator" by Gagnon et al seems inappropriate because castration is defined as removal of testes).

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Management:

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References:

Gagnon, A.-E., Boivin, G., Belair, G., and Mimee, B. 2019. Prevalence of a nematode castrator of the carrot weevil and impact on fecundity and survival. Parasitology 146:702-707

Zeng, Y., Giblin-Davis, R.M., Ye, W., Belair, G., Boivin, G., Thomas, W.K. 2007. Bradynema listronoti n. sp. (Nematoda: Allantonematidae), a parasite of the carrot weevil Listronotus oregonensis (Coleoptera: Curculionidae) in Quebec, Canada. Nematology, 9: 609-623