Entomophaga

, Volume 28, Issue 1, pp 17–25 | Cite as

Use of the parasiteEncarsia formosa [Hym.: Aphelinidae] as a part of pestmanagement on cucumbers

  • C. Stenseth
  • I. Aase
Article

Abstract

Experiments using the parasiteEncarsia formosa Gahan to controlTrialeurodes vaporariorum (Westwood) on commercially grown cucumbers are described.

Encarsia formosa was introduced by the dribble method or at different rates whenT. vaporariorium infestation was detected. It is concluded that an initial number of 10–30 adultT. vaporariorum per 100 plants require 3 parasite introductions at a rate of 5 parasites per plant, while less than 1 adultT. vaporariorum per 100 plants requires a rate of 3 parasites per plant in each introduction.

The use ofE. formosa could not be integrated with diazinon or lindane drenches againstThrips tabaci Lindem., but was successfully integrated with triforine spray against mildew infestations.

Keywords

Plant Pathology Plant parT Lindane Initial Number Diazinon 

Résumé

Des expérimentations, utilisant le parasiteEncarsia formosa Gahan pour contrôlerTrialeurodes vaporariorum (Westwood) en serres commerciales de concombre, sont ici décrites.

Encarsia formosa a été introduit suivant 2 techniques: la «dribble method» ou des apports en quantité variable lorsque l'infestation des plants parT. vaporariorum est décelée. On a pu montrer qu'une infestation initiale de 10 à 30 adultes deT. vaporariorum pour 100 plants nécessitait 3 introductions du parasite à raison de 5 parasites par plante alors qu'une infestation inférieure, de l'ordre de 1 adulte d'aleurode pour 100 plants n'était justifiable que de 3 parasites par plante à chaque introduction.

L'emploi d'E. formosa n'a pas pu être associé avec les traitements au diazinon ou au lindane utilisés contreThrips tabaci Lindem., mais il a été associé avec succès à l'emploi de la triforine contre l'oïdium.

Preview

Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.

References

  1. Bravenboer, L. &Dosse, G. — 1962.Phytoseiulus riegeli Dosse als Prädator einiger Schadmilben aus derTetranychus urticae-gruppe. —Entomol. Exp. Appl., 5, 291–304.Google Scholar
  2. Ekbom, B.S. — 1977. Development of a biological control program for greenhouse whiteflies (Trialeurodes vaporariorum Westwood) using its parasiteEncarsia formosa (Gahan) in Sweden. —Z. Angew. Entomol., 84, 145–154.Google Scholar
  3. Gould, H.J., Parr, W.J., Woodville, H.C. &Simmonds, S.P. — 1975. Biological control of glasshouse whitefly (Trialeurodes vaporariorum) on cucumbers. —Entomophaga, 20, 285–292.Google Scholar
  4. Hussey, N.W., Parr, W.J. &Gould, H.J. — 1965. Observations on the control ofTetranychus urticae Koch on cucumbers by the predatory mitePhytoseiulus riegeli Dosse. —Entomol. Exp. Appl., 8, 271–281.CrossRefGoogle Scholar
  5. Ledieu, M.S. — 1976. Dispersal of the parasiteEncarsia formosa as influenced by it's hostTrialeurodes vaporariorum. —Bull. O.I.L.B./S.R.O.P., 1976/4, 121–124.Google Scholar
  6. Parr, W.J. — 1969. Glasshouse whitefly. —Rep. Glasshouse Crops Res. Inst., 1968, 90.Google Scholar
  7. Parr, W.J., Gould, H.G., Jessop, N.H. &Ludlam, F.A.B. — 1976. Progress towards a biological control programme for glasshouse whitefly (Trialeurodes vaporariorum on tomatoes. —Ann. Appli. Biol., 83, 349–363.Google Scholar
  8. Speyer, E.R. — 1927. An important parasite of the greenhouse whitefly. —Bull. Entomol. Res., 17, 301–308.Google Scholar
  9. Stenseth, C. — 1976. Bruk av snyltevepsenEncarsia formosa Gahan [Eulophidae: Hymenoptera], til bekjempelse av veksthusmellus,Trialeurodes vaporariorum (Westw.) [Homoptera: Aleurodidae] på tomat i veksthus. —Forskn. Fors. Landbr., 27, 495–509.Google Scholar
  10. Stenseth, C. — 1980. Introduksjonsmetoder for rovmiddenPhytoseiulus persimilis Athias-Henriot til bekjempelse av veksthusspinnmidd (Tetranychus urticae Koch) på salatagurk i veksthus[Acarina: Phytoseiidae; Tetranychidae]. — Meld. Norg. LandbrHogsk., 59, 12 pp.Google Scholar
  11. Vet, L.E.M., Lenteren, J.C. Van &Woets, J. — 1980. The parasite-host relationship betweenEncarsia formosa [Hymenoptera: Aphelinidae] andTrialeurodes vaporariorum [Homoptera: Aleyrodidae]. —Z. Angew. Entomol., 90, 26–51.Google Scholar
  12. Wardlow, L.R., Ludlam, A.B. &Bradley, L.F. — 1976. Pesticide resistance in glasshouse whitefly (Trialeurodes vaporariorum Westw.) —Pesticide Sci., 7, 320–324.Google Scholar
  13. Woets, J. — 1973. Integrated control in vegetables under glass in the Netherlands. —Bull. O.I.L.B./S.R.O.P., 1973/4, 26–31.Google Scholar
  14. Woets, J. &Lenteren, J.C. Van, — 1976. The parasite-host relationship betweenEncarsia formosa [Hymenoptera: Aphelinidae] andTrialeurodes vaporariorum [Homoptera: Aleyrodidae]. —Bull. O.I.L.B./S.R.O.P., 1976/4, 151–164.Google Scholar

Copyright information

© Lavoisier Abonnements 1983

Authors and Affiliations

  • C. Stenseth
    • 1
  • I. Aase
    • 1
  1. 1.Division of EntomologyNorwegian Plant Protection InstituteAs-NLHNorway

Personalised recommendations