Entomophaga

, Volume 23, Issue 1, pp 63–67 | Cite as

Orientation of field populations ofBrachymeria intermedia [Hym.: Chalcididae], to host and host-habitat cues

  • P. Barbosa
  • E. A. FrongilloJr.
  • W. Cranshaw
Article

Abstract

Brachymeria intermedia (Nees), a pupal parasitoid of the gypsy moth, was caught in the field using plexiglas traps coated with Tangletrap (2). Significantly greater numbers of females were collected in traps baited with gypsy moth pupae than in traps with male or femaleB. intermedia or traps painted yellow.B. intermedia collected in traps during the first 3 weeks of native gypsy moth pupation were primarily female. A preponderance of males were caught during the fourth week. The hyperparasite,Brachymeria compsilurae (Cwfd) was also trapped in small numbers.

Gypsy moth pupae were hung in interior and exterior areas of woodland sites. A greater number ofB. intermedia emerged from pupae in woodland edge sites than from pupae in interior woodland sites.

Keywords

Plant Pathology Gypsy Moth Field Population Edge Site Woodland Site 

Résumé

Brachymeria intermedia (Nees), parasitoïde des nymphes deLymantria dispar L. a été capturé dans la nature à l'aide de pièges en plexiglass recouvert de glu.

Des nombres de femelles significativement plus élevés furent capturées par des pièges appâtés avec des nymphes deL. dispar par rapport à des pièges contenant des mâles ou des femelles deB. intermedia ou à des pièges peints en jaune. LesB. intermedia récoltés dans les pièges pendant les 3 premières semaines de la nymphose deL. dispar furent essentiellement des femelles. Les mâles furent prépondérants la 4e semaine. L'hyperparasite,Brachymeria compsilurae (Cwfd.) fut également capturé en petit nombre.

Des chrysalides deL. dispar furent accrochées dans des zones à l'intérieur ou à l'extérieur de sites boisés. Un plus grand nombre deB. intermedia a été obtenu des chrysalides placées en bordure des sites boisés que des chrysalides mises à l'intérieur des bois.

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Copyright information

© Le François 1978

Authors and Affiliations

  • P. Barbosa
    • 1
  • E. A. FrongilloJr.
    • 1
  • W. Cranshaw
    • 1
  1. 1.Department of EntomologyUniversity of MassachusettsAmherstUSA

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