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Measuring the host preference of parasites: An aid in evaluating biotypes ofAnagrus epos [Hym.: Mymaridae]

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Abstract

Populations ofAnagrus epos Girault are being imported and evaluated for the biological control of variegated grape leafhopper,Erythroneura variabilis Beamer, a newly introduced pest of grapes in central California. To distinguish different biotypes, a field test was developed that quantifies host preference.E. epos collected from geographically isolated regions of western United States and northern Mexico showed different levels of preference towards the variegated leafhopper and its close relative the grape leafhopper,Erythroneura elegantula Osborn, a native to central California. Host preference values may aid in the identification of relased biotypes using leafhopper eggs on leaves sampled from release sites.

Résumé

Plusieurs biotypes d'Anagrus epos Girault [Hym.: Mymairdae] ont été importés et évalués pour la lutte biologique contre la cicadelleErythroneura variabilis Beamer, espèce nuisible à la vigne en Californie centrale. Nous avons développé une méthode pratique qui quantifie par un coefficient la préférence. Les biotypes d'Anagrus epos venant de zones géographiques isolées différentes de l'ouest américain et du nord du Mexique ont montré divers degrés de préférence pour les 2 espèces principales de cicadelles. Les mesures de la préférence des biotypes, élevés en laboratoire peuvent fournir des caractères propres à identifier les individus libérés sur le terrain.

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Author notes

  1. C. H. Pickett

    Present address: Environmental Monitoring and Pest Management, California Department of Food and Agriculture, 1220 N St., 95814, Sacramento, CA, USA

  2. D. L. Flaherty

    Present address: Cooperative Extension, Agri. Bldg, Couty Civic Center, University of California, 93291, Visalia, California, USA

  3. D. Gonzaiez

    Present address: Division of Biological Control, Department of Entomology, University of California, 92521, Riverside, California, USA

Authors and Affiliations

  1. Department of Entomology, University of California, 95616, Davis, California, USA

    C. H. Pickett, L. T. Wilson, D. L. Flaherty & D. Gonzaiez

Authors
  1. C. H. Pickett
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  2. L. T. Wilson
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  3. D. L. Flaherty
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  4. D. Gonzaiez
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Pickett, C.H., Wilson, L.T., Flaherty, D.L. et al. Measuring the host preference of parasites: An aid in evaluating biotypes ofAnagrus epos [Hym.: Mymaridae] . Entomophaga 34, 551–558 (1989). https://doi.org/10.1007/BF02374393

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  • DOI: https://doi.org/10.1007/BF02374393

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