Advertisement

Deroceras laeve Müll. (Mollusca: Limacidae), ein Eiräuber von Pegomyia betae Curt. (Muscidae)

  • U. Röttger
  • F. Klingauf
Article

Abstract

Observations on the predacious activity ofDeroceras laeve Müll. (Mollusca: Limacidae)on eggs ofPegomyia betae Curt.(Muscidae) andEpilachna varivestis Muls.(Coccinellidae).

Deroceras laeve was observed feeding on eggs ofPegomyia betae in the laboratory and in the field. Since little is known about predacious behaviour of species of Limacidae, tests were conducted on the food preferences in two sets of experiments: (1) eggs ofP. betae on sugar beet leaves and (2) eggs ofEpilachna varivestis on bush bean leaves. Eggs ofP. betae were preferred over sugar beet leaf tissue (Fig. 1 and 2). The results showed that the slugs in addition to feeding on the eggs consume small amounts of the surrounding plant surface tissue. The feeding on eggs, however, was not considered to be accidential, because on leaves lacking eggs or on leaves with decreasing number of eggs,D. laeve fed predominantly on the tissue of the leaf margin. In the other set of experiments withE. varivestis the slugs were also found feeding on eggs, but showed a higher preference for plant tissue when compared with P. betae (Table 1).

Preview

Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.

Literaturverzeichnis

  1. Franz, J. M.;Krieg, A., 1972: Biologische Schädlingsbekämpfung. Verlag Paul Parey, Berlin und Hamburg, 208 S.Google Scholar
  2. Godan, D., 1960: Schneckenschäden und ihre Abwehr. Gesunde Pflanze12, 151–161.Google Scholar
  3. Lebour, M. V., 1915: Some feeding habits of slugs. Ann. appl. Biol.1, 393–395.Google Scholar
  4. Plate, H.-P.;Frömming, E., 1953: Die tierischen Schädlinge unserer Gewächshauspflanzen. Duncker und Humblot, Berlin, 288 S.Google Scholar
  5. Tomaszewski, W., 1949: Mollusca, Weichtiere, In:Sorauer, P., Handbuch der Pflanzenkrankheiten, Band IV, 1, 5. Auflage, Paul Parey Berlin und Hamburg, 100–116.Google Scholar

Copyright information

© Verlag Paul Parey, Berlin und Hamburg 1976

Authors and Affiliations

  • U. Röttger
    • 1
  • F. Klingauf
    • 1
  1. 1.Institut für Pflanzenkrankheiten der Universität Bonn5300 Bonn

Personalised recommendations