, Volume 19, Issue 4, pp 421–426 | Cite as

Potential ofGeocoris punctipes [Hemiptera: Lygaeidae] andNabis spp. [Hemiptera: Nabidae] as predators ofEpilachna varivestis [Coleoptera: Coccinellidae]

  • Van Waddill
  • Merle Shepard


Predation byGeocoris punctipes (Say) andNabis spp. onEpilachna varivestisMulsant was studied in the laboratory at 26.7°C and in field cages containing soybeans. Both predator groups fed uponE. varivestis eggs, 1st, 2nd and 3rd stage larvae, but not upon 4th stage larvae, pupae, or adults.

G. punctipes females produced significantly fewer eggs when fedE. varivestis eggs or 1st stage larvae than those fedGalleria mellonella (L.). Longevity of maleG. punctipes was significantly reduced when fedE. varivestis eggs; however, female longevity was not affected.

Results from field cage tests indicated bothG. punctipes andNabis spp. could significantly reduce the density ofE. varivestis.


Cage Plant Pathology Stage Larva Cage Test Field Cage 
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La prédation deEpilachna varivestisMulsant parGeocoris punctipes (Say) etNabis sp. a été étudiée en laboratoire à 26°7 C et dans la nature dans des cages contenant du soja. Les deux types de prédateurs s'alimentent aux dépens des œufs et des trois premiers stades larvaires deE. varivestis, mais non aux dépens des larves du 4e stade, des nymphes et des imagos.

Les femelles deG. punctipes donnent significativement moins d'œufs si elles sont nourries avec des œufs ou des larves du premier stade deE. varivestis que celles alimentées avecGalleria mellonella. La longévité des mâles deG. punctipes est significativement diminuée avec une alimentation sur œufs deE. varivestis, toutefois la longévité des femelles n'est pas affectée.

D'après les résultats des essais sous cageG. punctipes etNabis sp. peuvent réduire de façon significattive la densité des populations deE. varivestis.


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Copyright information

© Le François 1974

Authors and Affiliations

  • Van Waddill
    • 1
  • Merle Shepard
    • 1
  1. 1.Dept. of Entomology and Economic ZoologyClemson UniversityClemsonU.S.A.

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