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Entomophaga

, Volume 33, Issue 4, pp 421–429 | Cite as

Inundative biological control of velvetleaf,Abutilon theophrasti [Malvaceae] withNiesthrea louisianica [Hem.: Rhopalidae]

  • N. R. Spencer
Article

Abstract

Niesthrea louisianica Sailer (Rhopalidae) is native from Arizona to Florida north to New York and West to Iowa in the Mississippi Valley. Immatures and adults feed on seeds of malvaceous plants. Velvetleaf,Abutilon theophrasti Medic. (Malvaceae), is a major exotic weed of corn, soybeans, cotton, and sorghum, and is among the hosts forN. louisianica. A laboratory colony ofN. louisianica was established in 1984 using imbibed velvetleaf seeds as the food source. The colony was expanded in 1985 to support field releases in velvetleaf infested fields in the Midwest and New York State. Approximately 83,000 adultN. louisianica were released in 5 States. The insects reproduced and were found more than a kilometer from the release point at some release sites. In areas of establishment, a significant reduction in seed viability was recorded.

Key-Words

Biocontrol of weeds augmentative control inundative control Insect Mass Rearing 

Résumé

Niesthrea louisianica Sailer (Rhopalidae) est indigène en Arizona, en Floride du Nord, dans l'Etat de New York et l'Ouest de l'Iowa dans la Vallée du Mississippi. Les stades larvaires et les adultes se nourrissent des graines de plants de Malvacées.Abutilon theophrasti Medic. (Malvaceae) est une mauvaise herbe exotique majeure du maïs, du soja, du coton et du sorgho et constitue un des hôtes deN. louisianica. Une colonie de laboratoire deN. louisianica a été créée en 1984 utilisant des graines d'Abutilon imprégnées comme source de nourriture. La colonie a été multipliée en 1985 pour faire face aux lâchers dans les champs infestés par l'Abutilon dans le centre Ouest et l'état de New York. Environ 83 000 adultes deN. louisianica ont été lâchés dans 5 Etats. Les insectes se sont reproduits et ont été trouvés à plus d'un kilomètre du point de lâcher dans quelques sites d'introduction. Dans les zones où l'insecte s'est établi, une réduction significative de la viabilité des graines a été enregistrée.

Mots Clés

Lutte biologique contre les mauvaises herbes lutte inondative élevage de masse d'Insectes 

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Copyright information

© Lavoisier Abonnements 1988

Authors and Affiliations

  • N. R. Spencer
    • 1
  1. 1.Agricultural Research Service Northern Plains Research LaboratoryU.S. Department of AgricultureSidneyUSA

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