Functional response of Trichogramma chilonis to Galleria mellonella and Chilo sacchariphagus eggs

A biological control programme using inundative releases of Trichogramma chilonis Ischii (Hymenoptera: Trichogrammatidae) reared on Galleria mellonella L. (Lepidoptera: Pyralidae) is currently underway to reduce infestations of Chilo sacchariphagus Bojer (Lepidoptera: Crambidae) in sugarcane, Saccha...

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Bibliographic Details
Published in:Entomologia experimentalis et applicata 2006-03, Vol.118 (3), p.229-236
Main Authors: Reay-Jones, F.P.F., Rochat, J., Goebel, R., Tabone, E.
Format: Article
Language:English
Subjects:
Biodiversity
Biological and medical sciences
Biological control
Chilo
Chilo sacchariphagus
Control
Crambidae
Fundamental and applied biological sciences. Psychology
Galleria mellonella
Hymenoptera
Lepidoptera
Life Sciences
parasitoid
Phytopathology. Animal pests. Plant and forest protection
Protozoa. Invertebrates
Pyralidae
Saccharum
stem borer
sugarcane
Trichogramma chilonis
Trichogrammatidae
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Summary:A biological control programme using inundative releases of Trichogramma chilonis Ischii (Hymenoptera: Trichogrammatidae) reared on Galleria mellonella L. (Lepidoptera: Pyralidae) is currently underway to reduce infestations of Chilo sacchariphagus Bojer (Lepidoptera: Crambidae) in sugarcane, Saccharum spp., on Réunion Island. To assess the potential of the parasitoid as an inundative biocontrol agent, the functional response of three T. chilonis strains was tested with G. mellonella and one strain with C. sacchariphagus host eggs in glass tubes in the laboratory. The shape of the functional response (type II or III) was determined using logistic regression, and attack coefficients and handling times (Th) were determined using non‐linear least‐square regression. The behaviour of all three strains with G. mellonella host eggs corresponded to a type III response. The St Benoît T. chilonis strain had a significantly shorter estimate of Th than the St Pierre strain (P
ISSN:0013-8703
1570-7458
DOI:10.1111/j.1570-7458.2006.00380.x