Skip to main content
SpringerLink
Log in

Competitive displacement ofAnagyrus antoninae [Hym.: Encyrtidae]. by its ecological homologueNeodusmetia sangwani [Hym.: Encyrtidae]

  • Published:
Entomophaga Aims and scope Submit manuscript

Abstract

The displacement ofAnagyrus antoniaae Timberlake byNeodusmetia sangwani (Rao) was demonstrated by reduced parasitism by the former in two localities after the latter was introduced into these sites. The competitive factors were: (1) the host-regulative action ofN. sangwani maintained a low host reciprocal balance, and (2) the inability of the female ofA. antoninae at the prevailing host density to find hosts sufficient for reproduction. The lack of competitiveness ofA. antoninae was a result of its inability to develop at high vapor deficits.

Résumé

Le déplacement deAnagyrus antoninae Timberlake parNeodusmetia sangwani (Rao) a été, démontré par le parasitisme moindre du premier dans deux localités après l'introduction du second dans cas sites. Les facteurs de compétition sont:

  1. 1o

    l'action régulatrice des populations de l'hôte parN. sangwani se maintient aux faibles densités,

  2. 2o

    l'incapacité de la femelle deA. antoninae de trouver suffisamment d'hôtes pour la reproduction, lorsque la densité des hôtes prédomine. Le manque de compétitivité deA. antoninae est une conséquence de son incapacité de se développer lorsqu'il fait très sec.

This is a preview of subscription content, log in via an institution to check access.

Access this article

Log in via an institution

Price excludes VAT (USA)
Tax calculation will be finalised during checkout.

Instant access to the full article PDF.

Institutional subscriptions

Similar content being viewed by others

References

  • Andrewartha, H. G. &Birch, L. C. — 1954. The Distribution and Abundance of Animals. —Univ. of Chicago Press, Chicago.

    Google Scholar 

  • Ayala, F. J. — 1969. Experimental invalidation of the principle of competitive exclusion. —Nature 224, 1076–9.

    CAS  PubMed  Google Scholar 

  • Dean, H. A. — 1964. Introduction and establishment ofAnagyrus antoninae on rhodesgrass scale in Mexico. —J. Econ. Entomol., 53, 694.

    Google Scholar 

  • Dean, H. A. &Schuster, M. F. — 1958. Biological control of rhodesgrass scale in Texas. —J. Econ. Entomol., 51, 363–366.

    Google Scholar 

  • Dean, H. A., Schuster, M. F. &Bailey, J. C. — 1961. The introduction and establishment ofDusmetia sangwani onAntoninae graminis in south Texas. —J. Econ. Entomol., 54, 952–954.

    Google Scholar 

  • DeBach, P. &Sundby, R. A. — 1963. competitive displacement between ecological homologues. —Hilgardia, 34, 105–166.

    Google Scholar 

  • Flanders, S. — 1966. The circumstances of species replacement among parasitic Hymenoptera. —Can. Entomol., 98, 1009–1023.

    Google Scholar 

  • Riherd, P. T. — 1950. Biological notes onAnagyrus antoninae Timb. [Hymenoptera: Encyrtidae] and its hostAntoninae graminis (Maskell) [Homoptera: Coccidae]. —Fla Entomol., 33, 18–22.

    Google Scholar 

  • Schuster, M. F. — 1965. Studies on the biology ofDusmetia sangwani [Hymenoptera: Encytidae]. —Ann. Entomol. Soc. Am., 58, 272–275.

    Google Scholar 

  • Schuster, M. F. & Boling, J. C. — 1971. Biological control of rhodesgrass scale in Texas byNeodusmetia sangwani (Rao): Effectiveness and colonization studies. —Texas Agr. Exp. Stn. Bull., 1104, 15 pp.

Download references

Author information

Author notes

  1. M. F. Schuster

    Present address: Presently Mississippi Agricultural and Forestry Experiment Station, Mississippi, USA

Authors and Affiliations

  1. Texas Agricultural Experiment Station, Weslaco, Texas, U.S.A.

    M. F. Schuster & H. A. Dean

Authors
  1. M. F. Schuster
    View author publications

    You can also search for this author in PubMed Google Scholar

  2. H. A. Dean
    View author publications

    You can also search for this author in PubMed Google Scholar

Additional information

This research was supported in part by King Ranch, Inc., and R. M. A. Contract 12-14-100-829 (33).

Rights and permissions

Reprints and permissions

About this article

Cite this article

Schuster, M.F., Dean, H.A. Competitive displacement ofAnagyrus antoninae [Hym.: Encyrtidae]. by its ecological homologueNeodusmetia sangwani [Hym.: Encyrtidae] . Entomophaga 21, 127–130 (1976). https://doi.org/10.1007/BF02371898

Download citation

  • Issue Date:

  • DOI: https://doi.org/10.1007/BF02371898

Keywords

Search

Navigation