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The introduction and establishment of parasites of citrus blackfly,Aleurocanthus woglumi in Florida [Hem.: Aleyrodidae]

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Abstract

Three species of laboratory-reared parasites of citrus blackfly,Aleurocanthus woglumi Ashby, were released at Fort Lauderdale, Florida in 1976 following discovery of this citrus pest in residential properties there.Amitus hesperidum Silv. andProspaltella opulenta Silv. were recovered 6 weeks after release and sharp increases in the rate of parasitism were observed throughout the season. Seven months after the initial release, 100% parasitism of citrus blackfly pupae was observed at some release sites, and 95% of the original release sites were found positive for the parasite. Observations after 1 year showed significant levels of parasitism over a large area. The rapid establishment and increase of these parasite species indicate that environmental conditions and the host at Fort Lauderdale are suitable for these species and that they may well provide control of the pest.

Résumé

Trois espèces de parasites de l'aleurode des citrus,Aleurocanthus woglumi Ashby, élevées en laboratoire, ont été lâchées à Fort Lauderdale, Floride, en 1976 à la suite de la découverte de ce ravageur des citrus dans des propriétés résidentielles.Amitus hesperidum Silv. etProspaltella opulenta Silv. ont été retrouvés 6 semaines après leur lâcher et une augmentation rapide du taux de parasitisme a été observée au cours de la saison. Sept mois après le premier lâcher, on observait 100% de parasitisme des nymphes de l'aleurode dans certains points de lâcher et 95% des sites de lâchers se révélaient renfermer le parasite. Au bout d'un an on notait des taux de parasitisme significatif sur une vaste surface. L'établissement rapide et l'extension de ces parasites montrent que les conditions du milieu et de l'hôte à Fort Lauderdale sont favorables à ces espèces et que celles-ci peuvent être d'efficaces agents de lutte biologique contre l'aleurode des citrus.

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References

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Hart, W.G., Selhime, A., Harlan, D.P. et al. The introduction and establishment of parasites of citrus blackfly,Aleurocanthus woglumi in Florida [Hem.: Aleyrodidae]. Entomophaga 23, 361–366 (1978). https://doi.org/10.1007/BF02373053

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  • DOI: https://doi.org/10.1007/BF02373053

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