| The abundance and species composition of natural enemies (spiders and carabid beetles) and some of their important arthropod food sources (microarthropods, dipterans and hymenopterans) were sampled by soil extraction, pitfall traps and sticky traps in winter wheat placed in an organic crop with undersown catch crops and animal manure (slurry). The working hypothesis was that the undersown crops and animal manure would stimulate the microarthropods and other food sources, thereby enhancing the abundance of natural enemies. The ANOVA analyses revealed no impact of manuring and undersown catch crops on the microarthropods, but there was a larger abundance of most predator groups in the manured plots. There was not found any impact of undersown crops on the... |
