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| Navntoft, S.; Thorup-Kristensen, K.; Eilenberg, J.; Kristensen, K.; Meyling, N.V.. |
| Organic farming should support high levels of biodiversity and rely on biological pest control by natural enemies. Management of organic systems must comply with specific regulations, but within this frame management is not clearly defined. In experimental cabbage fields we studied ground beetle abundance and diversity in three different organic farming systems (O1, O2, and O3). All systems complied with regulations for organic production, but relied on either high (O1) or low (O2 and O3) external input of nutrients. The systems O2 and O3 also included green manures, and in O3 strips of green manure were left between crop rows. A conventional system was included as control. Only organic systems O2 and O3 showed benefits for ground beetles, but in different... |
| Tipo: Journal paper |
Palavras-chave: Biodiversity and ecosystem services. |
| Ano: 2011 |
URL: http://orgprints.org/19303/4/19303.pdf |
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| Meyling, N.; Navntoft, S.; Philipsen, H.; Thorup-Kristensen, K.. |
| In a field experiment, we evaluated effects of three different organic white cabbage-cropping systems (O1, O2, O3) on the cabbage root fly, Delia radicum, and its egg predators and pupal parasitoids over 3 years. The three systems all complied with regulations for organic production, but varied in external nutrient input and N-recycling, and were compared to a conventionally farmed control. One organic system (O3) included an intercropped strip of green manure between crop rows. Oviposition by D. radicum was generally not reduced in organic cropping systems. However, higher pupae/egg ratios were observed in the conventional compared to all organic systems, indicating that immature survival from oviposition to pupation was reduced under all the three... |
| Tipo: Journal paper |
Palavras-chave: Production systems; Soil biology; Vegetables; Biodiversity and ecosystem services. |
| Ano: 2013 |
URL: http://orgprints.org/22837/7/22837.pdf |
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