Effects of habitat, temperature, and sugar availability on longevity of Eriborus terebrans (Hymenoptera: Ichneumonidae)

Eriborus terebrans (Gravenhorst) is the primary parasitoid of the European corn borer, Ostrinia nubilalis (Hubner) (Lepidoptera: Pyralidae), in Michigan. Previous studies demonstrated that early in the growing season, E. terebrans adults are more abundant, and parasitize a greater proportion of O. n...

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Bibliographic Details
Published in:Environmental entomology 1996-10, Vol.25 (5), p.1192-1201
Main Authors: Dyer, L.E. (Natural Resources Conservation Service, Michigan State Office, East Lansing, MI.), Landis, D.A
Format: Article
Language:English
Subjects:
AUXILIAIRE DE LUTTE BIOLOGIQUE
AZUCARES
Biological and medical sciences
Biological control
Control
DISPONIBILIDAD DE NUTRIENTES
DISPONIBILITE D'ELEMENT NUTRITIF
Eriborus terebrans
Fundamental and applied biological sciences. Psychology
HABITAT
HUMEDAD RELATIVA
HUMIDITE RELATIVE
ICHNEUMONIDAE
INSECTE NUISIBLE
INSECTOS DANINOS
LONGEVIDAD
LONGEVITE
MICHIGAN
MICROCLIMA
MICROCLIMAT
Noctuidae
ORGANISMOS PARA CONTROL BIOLOGICO
OSTRINIA NUBILALIS
PARASITE
PARASITOIDE
PARASITOIDES
PARASITOS
Phytopathology. Animal pests. Plant and forest protection
Protozoa. Invertebrates
SUCRES
TEMPERATURA AMBIENTAL
TEMPERATURE AMBIANTE
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Summary:Eriborus terebrans (Gravenhorst) is the primary parasitoid of the European corn borer, Ostrinia nubilalis (Hubner) (Lepidoptera: Pyralidae), in Michigan. Previous studies demonstrated that early in the growing season, E. terebrans adults are more abundant, and parasitize a greater proportion of O. nubilalis larvae, near wooded edges of cornfields. We hypothesized that E. terebrans requires a source of sugar and a moderate microclimate available in the woodlot, but not in the cornfield. Growth chamber and greenhouse experiments demonstrated that longevity of E. terebrans that are provided sugar was greater than those provided only water, or neither; and wasp longevity was greater at 25 than 35 degrees C. In field experiments, wasps were caged in cornfields, woodlots, wooded fencerows, and herbaceous vegetation, early and late in the season. Longevity of E. terebrans adults was greater in woodlots than early season cornfields. Wasps lived buyer in all habitats late in the season than early in the season. In all habitats, wasp longevity was enhanced by sugar. These and previous studies indicate that E. terebrans needs habitats adjacent to cornfields for sources of sugar and a moderate microclimate unavailable in early season corn. In annual agriculture, perennial habitats adjacent to crop fields may be necessary to provide the structure, stability, and resources needed for the successful conservation of natural enemies and effective biological control
ISSN:0046-225X
1938-2936
DOI:10.1093/ee/25.5.1192