, Volume 24, Issue 3, pp 221–227 | Cite as

Synchrony and impact ofAmitus hesperidum [Hym.: Platygasteridae] on its host,Aleurocanthus woglumi [Hym.: Aleyrodidae] in southern Florida

  • R. V. Dowell


The synchrony of the citrus blackfly (CBF)Aleurocanthus woglumiAshby and its parasitoidAmitus hesperidumSilvestri was studied in southern Florida.A. hesperidum adults emerge from 4th instar nymphs 160–300 thermal units after CBF adults. This insured excellent temporal synchronization between the parasitoids and the early CBF instars they prefer since egg to 3rd instar nymph in CBF takes 380 thermal units. AlthoughA. hesperidum parasitized only 29% of the surviving 4th instar CBF, it was the factor responsible for the observed decline in the CBF population level in southern Florida.


Assure Plant Pathology Population Level Floride Instar Nymph 
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La coïncidence de la mouche noire des citrus,Aleurocanthus woglumiAshby et de son parasitoïde,Amitus hesperidumSilvestri a été étudiée en Floride mérioionale. Les imagos deA. hesperidum sortent des larves du 4e stade de l’aleurode quand il y a eu 160 à 300 unités thermiques après la sortie des aleurodes adultes. Ce phénomène assure une excellente coïncidence temporelle entre les parasitoïdes et les premiers stades de l’aleurode, qu’ils préfèrent, puisque le développement depuis l’œuf jusqu’au 3e stade de l’aleurode demande 380 unités thermiques. Bien qu’A. hesperidum parasite seulement 29% des aleurodes du 4e stade survivant, il a constitué le facteur responsable de la réduction du niveau de population de l’aleurode observé en Floride méridionale.


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  1. Cherry, R. H. — 1979. Lethal temperatures of citrus blackflyAleurocanthus woglumi [Hom.: Aleyrodidae] and its parasite,Amitus hesperidum [Hym.: Platygasteridae]. —Entomophaga, 24, 35–39.CrossRefGoogle Scholar
  2. Dietz, H. F. & Zetek, J. — 1920. The blackfly of citrus and other tropical plants. —U.S.D.A. Bull. Tech., 885, 55 pp.Google Scholar
  3. Dowell, R. V. &Fitzpatrick, G. E. — 1978. Effects of temperature on growth and survivorship of the citrus blackfly. —Can. Entomol., 110, 1347–1350.Google Scholar
  4. Dowell, R. V., Reinert, J. A. &Fitzpatrick, G. E. — 1978. Development and survivorship ofAleurocanthus woglumi Ashby on six citrus hosts. —Environ. Entomol., 7, 524–525.Google Scholar
  5. Enkerlin, D. W. — 1974. Some aspects of the citrus blackfly (Aleurocanthus woglumi Ashby) in Mexico. —Proc. Tall Timbers Conf. Ecol. Anim. Cont. Habitat Mgmt., 6, 65–76.Google Scholar
  6. Fitzpatrick, G. E., Cherry, R. H. &Dowell, R. V. — 1978. Short-term effects of three insecticides on predators and parasites of the citrus blackfly. —Environ. Entomol., 7, 553–555.Google Scholar
  7. Flanders, S. W. — 1969.Herbert Smith’s observations on citrus blackfly parasites in India and Mexico and the correlated circumstances. —Can. Entomol., 101, 467–480.Google Scholar
  8. Griffiths, K. J. — 1969. The importance of coincidence in the functional and numerical responses of two parasites of the European sawfly,Neodiprion sertifer. —Can. Entomol., 101, 673–713.Google Scholar
  9. Hart, W. G., Selhime, A., Harlan, D. P., Ingle, S. J., Sanchez, R. M., Rhode, R. H., Garcia, C. A., Caballero, J. &Garcia, R. L. — 1978. The introduction and establishment of parasites of citrus blackfly,Aleurocanthus woglumi in Florida. —Entomophaga, 23, 361–366.CrossRefGoogle Scholar
  10. Newell, W. &Brown, A. C. — 1939. Eradication of the citrus blackfly in Key West, Fla. —J. Econ. Entomol., 32, 680–682.Google Scholar
  11. Quezada, J. R. — 1974. Biological control ofAleurocanthus woglumi [Homoptera: Aleyrodidae] in El Salvador. —Entomophaga, 19, 143–154.Google Scholar
  12. Reinert, J. A. — 1976. Citrus blackfly control by foliar treatments of dooryard citrus. —Proc. Fla. State Hort. Soc., 89, 365–366.Google Scholar
  13. Richardson, H. H. — 1949. Present status of the citrus blackfly and its parasiteEretmocerus serius at Nassau, Bahamas. —J. Econ. Entomol., 41, 980.Google Scholar
  14. Smith, H. D., Maltby, H. L. & Jimenez, J. E. — 1964. Biological control of the citrus blackfly in Mexico. —U.S.D.A. Tech. Bull., 1311, 29 pp.Google Scholar
  15. Southwood, T. R. E. — 1975. Ecological Methods. — Chapman & Hall, London, 391 pp.Google Scholar

Copyright information

© Le François 1979

Authors and Affiliations

  • R. V. Dowell
    • 1
  1. 1.Agricultural Research CenterFloridaFt. LauderdaleUSA

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