Skip to main content
Log in

Dailay and seasonal density of four entomophagous predators on cotton in upper Egypt

  • Mémoires Originaux
  • Published:
Entomophaga Aims and scope Submit manuscript

Zusammenfassung

Auf einer Baumwollpflanzung in Oberägypten wurde die Individuenabundanz von folgenden Entomophagen von Juni bis September ermittelt: Imagines vonCoccinella undecim-punctata (Col., Coccinellidae); Scymnus interruptus (Col., Coccinellidae); Paederus alfierii (Col. Staphylinidae) und Larven vonChrysopa carnea (Neur., Chrysopidae). Die Werte wurden 2mal wöchentlich durch morgendliches Abzählen der sichtbaren Tiere an je 50 Pflanzen auf 40 unbehandelten Parzellen gewonnen. Die gefundenen Zahlen zeigen, umgerechnet auf 1 Feddan =0,42 ha, eine unterschiedliche Höhe für die einzelnen Arten und im Laufe der Beobachtungszeit. Trotz erheblicher Tagesschwankungen von Lufttemperatur und rel. Luftfeuchtigkeit liess sich bei stündlicher Abzählung (4.-8. VI) keine Beziehung zwischen Witterungsdaten und Abundanz der kontrollierten Entomophagen feststellen.

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

Access this article

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

Instant access to the full article PDF.

Institutional subscriptions

Literature

  • Ahmed, M. K. — 1957. Life history and feeding habits ofPaederus alfierii Koch. —Bull. Soc. ent. Egypte,41, 129–143.

    Google Scholar 

  • Azab, A. K., Tawfik, M. F. S. &Ismail, I. I. — 1965. Seasonal changes on the abundance of certain aphids and their predators in Giza. —Bull. Soc. ent. Egypte,49, 11–24.

    Google Scholar 

  • Banks, C. J. — 1955. An ecological study ofCoccinellidae associated withAphis fabae onVicia faba. —Bull. ent. Res.,46, 561–587.

    Google Scholar 

  • Banks, C. J. — 1957. The behaviour of individual coccinellid larvae on plants. —Brit. S. Anim.,6, 12–24.

    Google Scholar 

  • Bodenheimer, F. S. — 1943. Studies on the life history and ecology of theCoccinellidae; I: Life history ofCoccinella septem-punctata Reiche in 4 different zoogeographical regions. —Bull. Soc. ent. Egypte,27, 1–28.

    Google Scholar 

  • Burke, E. &Martin, D. F. — 1956. The biology of 3 chrysopid predators of the cotton aphids. —J. econ. Ent.,49, 698–700.

    Google Scholar 

  • DeBach, P., Dietrick, E. J. &Fleschner, C. A. — 1949. A new technique for evaluating the efficiency of entomophagous insects in the field. —J. econ. Ent.,42, 546–547.

    CAS  Google Scholar 

  • DeBach, P. — 1958. The role of weather and entomophagous species in the natural control of insect populations. —J. econ. Ent.,51, 474–484.

    Google Scholar 

  • Dumas, B. A., Boyer, W. P. &Whitcomb, W. H. — 1962. Effect of time of day on surveys of predaceous insects in field crops. —Florida Entomol.,45, 121–128.

    Google Scholar 

  • Hassan, M. S. — 1957. Studies on the damage and control ofAphis maidis Fitch, in Egypt. —Bull. Soc. ent. Egypte,41, 213–230.

    Google Scholar 

  • Hassanein, M. H. — 1956. Studies on the activity, phenology and population density of the aphid lionChrysopa vulgaris Schn. —Ann. agric. Sci., Ain-Shams,1, 145–160.

    Google Scholar 

  • Kamal, M. — 1951. The biological control of the cotton leaf wormProdenia litura F. in Egypt. —Bull. Soc. ent. Egypte,35, 221–270.

    Google Scholar 

  • Milne, A. — 1957. The natural control of insect population. —Canad. Ent.,89, 193–213.

    Google Scholar 

  • Smith, H. S. &DeBach, P. — 1942. The measurement of the effect of entomophagous insects on population density of their hosts. —J. econ. Ent.,35, 845–849.

    Google Scholar 

  • Tawfik, M. F. S., Hafez, M. &Said, B. — 1962. Studies onScymnus (=Pullus) syriacus Mars. —Bull. Soc. ent. Egypte,46, 485–504.

    Google Scholar 

Download references

Author information

Authors and Affiliations

Authors

Rights and permissions

Reprints and permissions

About this article

Cite this article

Hassanein, M.H., Afify, A.M. & Farghaly, H.T. Dailay and seasonal density of four entomophagous predators on cotton in upper Egypt. Entomophaga 13, 143–150 (1968). https://doi.org/10.1007/BF02371784

Download citation

  • Issue Date:

  • DOI: https://doi.org/10.1007/BF02371784

Keywords

Navigation