Entomophaga

, Volume 33, Issue 2, pp 185–192 | Cite as

Biology ofTyta luctuosa [Lep.: Noctuidae] and its potential value as a biological control agent for the weedConvolvulus arvensis

  • S. S. Rosenthal
  • S. L. Clement
  • N. Hostettler
  • T. Mimmocchi
Article

Abstract

The biology of the noctuid,Tyta luctuosa (Denis & Schiffermüller) (Lep.: Noctuidae), a defoliator of field bindweed,Convolvulus arvensis L., was studied in southern Europe.T. luctuosa is widely distributed and feeds on both thick stands and scattered host populations growing in a diversity of habitats. It undergoes 2 and perhaps a partial 3rd generation/year in southern Europe and is active during most of the growing season ofC. arvensis. In the laboratory the total time from egg to adult averages 45.6 days. There are 5 larval instars. Adult females deposit on average over 400 eggs. The larvae being able to feed and develop on native North AmericanCalystegia spp. in the laboratory, there are some reservations about its release in North America. However, the moth has potential value as a biological control agent for field bindeed in the western USA where it would fill an almost unoccupied niche.

Key-Words

Biological control Convolvulus arvensis insect host-plant relations Tyta luctuosa 

Résumé

La biologie de la NoctuelleTyta luctuosa (Dennis & Schiffermüller), défoliateur européen commun du liseron des champs (Convolvulus arvensis L.), a été étudiée dans le sud de l'Europe.T. luctuosa est largement distribué sur le plan, géographique et se nourrit sur des populations denses ou éparses de son hôte croissant dans des habitats divers. En Europe du Sud, il manifeste chaque année 2 générations et peut être une 3e partielle, son activité s'étendant à presque toute la saison de croissance deC. arvense. Au laboratoire, la durée totale de l'œuf jusqu'à l'adulte est en moyenne 45,6 jours. Il y a 5 stades larvaires. Les femelles adultes pondent en moyenne plus de 400 œufs. Etant donné que les seuls ennemis naturels découverts deT. luctuosa sont des parasites et des prédateurs communs et que les larves sont capables de se nourrir et de se développer au laboratoire sur des plantes originaires d'Amérique du Nord,Calystegia spp., on peut émettre quelques toire sur des plantes originaires d'Amérique du Nord,Calystegia spp., on peut émettre quelques réserves quant à son utilisation possible comme agent de lutte biologique en Amérique du Nord. Cependant,T. luctuosa possède une valeur potentielle comme agent de lutte biologique pour les champs de liserons dans l'ouest des Etats-Unis où il remplirait une niche écologique presque inoccupée.

Mots Clés

Lutte biologique Convolvulus arvensis relations insecte plante-hôte Tyta luctuosa 

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Copyright information

© Lavoisier Abonnements 1988

Authors and Affiliations

  • S. S. Rosenthal
    • 2
    • 1
  • S. L. Clement
    • 3
    • 1
  • N. Hostettler
    • 4
    • 1
  • T. Mimmocchi
    • 5
    • 1
  1. 1.Agricultural Research Service Biological Control of WeedsU. S. Department of AgricultureUSA
  2. 2.USDA-ARS-RIL-BCWMontana State UniversityBozemanUSA
  3. 3.USDA-ARS Regional Plant Introduction StationWashington State UniversityPullman
  4. 4.Department of Entomology and NematologyUniversity of FloridaGainesvilleUSA
  5. 5.American Embassy, AgricultureAPO New YorkUSA

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