Distribution and persistence ofSteinernema spp. andHeterorhabditis spp. (Nematodes) under different field conditions

  • L. Rovesti
  • E. W. Heinzpeter
  • K. V. Deseö


The vertical and horizontal distribution, as well as the persistence ofSteinernema glaseri, S. carpocapsae (1192, I 100 and Mexican strains),Heterorhabditis bacteriophora, H. heliothidis andHeterorhabditis sp. were studied in three different soil types under field conditions. The presence of infective juveniles in soil samples taken at various depths was assessed usingGalleria mellonella larvae as baits for the nematodes. Results show that all tested nematodes had a similar pattern of vertical distribution. On the other hand,Heterorhabditis spp. were significantly more persistent thanSteinernema spp. in all soil types. As for the horizontal dispersal, none of the nematodes were ever found outside the treated plots, indicating that most of the juveniles remained near the point of application.


Soil Sample Plant Physiology Similar Pattern Plant Pathology Soil Type 
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Zur Verbreitung und Beständigkeit vonSteinernema spp. undHeterorhabditis spp. (Nematodes) unter verschiedenen Freilandbedingungen


Es wurde die Vertikal- und Horizontalverbreitung vonSteinernema glaseri, S. carpocapsae (1192, I 100 und mexikanische Stämme),Heterorhabditis bacteriophora, H. heliothidis undHeterorhabditis sp. in 3 verschiedenen Bodentypen unter Freilandbedingungen untersucht. Die Anwesenheit von infektiven Juvenilen in Bodenproben aus verschiedenen Bodenhorizonten wurde mit Hilfe vonGalleria mellonella-Larven als Köder ermittelt. Die Ergebnisse zeigen, daß alle untersuchten Nematoden ein ähnliches Muster der Vertikalverbreitung aufweisen. Andererseits waren in allen BodentypenHeterorhabditis spp. signifikant beständiger alsSteinernema spp. Bezüglich der horizontalen Ausbreitung war auffällig, daß kein Nematode außerhalb der behandelten Stelle gefunden wurde, woraus hervorgeht, daß die meisten der Juvenilen in der Nähe des Behandlungspunktes bleiben.


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Copyright information

© Verlag Paul Parey 1991

Authors and Affiliations

  • L. Rovesti
    • 1
  • E. W. Heinzpeter
    • 1
  • K. V. Deseö
    • 2
  1. 1.C. N. R.-Centro di Studio per gli AntiparassitariBolognaItaly
  2. 2.Institute of Entomology “G. Grandi”Bologna UniversityBolognaItaly

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