Study

Effect of agricultural practices on carabid populations

  • Published source details Hance T. & Gregoirewibo C. (1987) Effect of agricultural practices on carabid populations. Acta Phytopathologica Et Entomologica Hungarica, 22, 147-160.

Actions

This study is summarised as evidence for the following.

Action Category

Use organic rather than mineral fertilizers

Action Link
Farmland Conservation
  1. Use organic rather than mineral fertilizers

    A small study of seven cereal fields over one year in Belgium (Hance & Gregoirewibo 1987) found that organic manure increased the abundance and number of species of ground beetles (Carabidae). A field with a 60 t/ha application of organic manure (and organophosphorus insecticide) had significantly higher abundance (1,128 individuals) and number of species (20 species) than a field with no organic manure (and organochloride insecticide, 14 species). Ground beetle abundance was highest (1690 individuals) when, as well as applying organic manure (30 t/ha), green manure was applied in late summer and turned under the soil in early spring. Species diversity was highest with the highest concentration of organic manure (60 t/ha, 20 species). An application of aldicarb insecticide with organic manure did not affect the number of individuals, but slightly reduced the number of species. However, without manure, the insecticide resulted in a three-fold reduction in the number of individuals. Fields differed in organic manure (none, 30 t/ha, 60 t/ha) and insecticide (aldicarb, lindane, E-605). Ten pitfall traps were placed in a row in each field, 4 m apart and were sampled from April to September.

     

Output references
What Works 2021 cover

What Works in Conservation

What Works in Conservation provides expert assessments of the effectiveness of actions, based on summarised evidence, in synopses. Subjects covered so far include amphibians, birds, mammals, forests, peatland and control of freshwater invasive species. More are in progress.

More about What Works in Conservation

Download free PDF or purchase
The Conservation Evidence Journal

The Conservation Evidence Journal

An online, free to publish in, open-access journal publishing results from research and projects that test the effectiveness of conservation actions.

Read the latest volume: Volume 18

Go to the CE Journal

Discover more on our blog

Our blog contains the latest news and updates from the Conservation Evidence team, the Conservation Evidence Journal, and our global partners in evidence-based conservation.


Who uses Conservation Evidence?

Meet some of the evidence champions

Endangered Landscape Programme Red List Champion - Arc Kent Wildlife Trust The Rufford Foundation Save the Frogs - Ghana Bern wood Supporting Conservation Leaders National Biodiversity Network Sustainability Dashboard Frog Life The international journey of Conservation - Oryx British trust for ornithology Cool Farm Alliance UNEP AWFA Butterfly Conservation People trust for endangered species Vincet Wildlife Trust