Skip to main content

Predation by the carabid beetles Pterostichus madidus and Nebria brevicollis is affected by size and condition of the prey slug Deroceras reticulatum

Buy Article:

$43.00 plus tax (Refund Policy)

Summary

1 Slugs are important pests in many agricultural crops but molluscicides commonly used to control slugs affect non-target organisms. Encouraging biological control may help to reduce molluscicide use, but the efficiency of potential natural enemies needs to be investigated.

2 Serological tests have shown that certain carabid species consume slugs. These techniques, however, do not distinguish between scavenging and true predation, nor do they provide information on the size or other characteristics of the prey consumed. The study reported here was undertaken to establish whether scavenging of dead slugs might be an important factor contributing to positive serological test results.

3 Both Pterostichus madidus (Fabricius) and Nebria brevicollis (Fabricius) consumed Deroceras reticulatum (Müller) under laboratory conditions. Dead slugs were scavenged in preference to injured or healthy slugs.

4 Only small, live slugs (< 0.11 g) were killed by both beetle species, which may, therefore, be incapable of killing larger slugs.

5 These generalist beetle species appeared unable to overcome the defence mucus produced by slugs. The data suggest that positive serological results from field collected beetles may reflect scavenging rather than predation on live or injured slugs.
No References
No Citations
No Supplementary Data
No Data/Media
No Metrics

Keywords: Biological control; carabids; insect behaviour; prey size; scavenging

Document Type: Research Article

Affiliations: Department of Agricultural and Environmental Science, Ridley Building, University of Newcastle upon Tyne, Tyne and Wear NE1 7RU, U.K.

Publication date: 2001-05-01

  • Access Key
  • Free content
  • Partial Free content
  • New content
  • Open access content
  • Partial Open access content
  • Subscribed content
  • Partial Subscribed content
  • Free trial content
Cookie Policy
X
Cookie Policy
Ingenta Connect website makes use of cookies so as to keep track of data that you have filled in. I am Happy with this Find out more