Organic farming affects the biological control of hemipteran pests and yields in spring barley independent of landscape complexity
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Hemipteran pests cause significant yield losses in European cereal fields. It has been suggested that local management interventions to promote natural enemies are most successful in simple landscapes that are dominated by large arable fields.
We study how farming category (conventional, new and old organic fields) and landscape complexity affect pests, natural enemies and biological control services in spring barley. We further analyse if yields are related to pest infestation or biological control services.
The amount of pasture and the length of field borders were used to define landscape complexity around barley fields in Southern Sweden. Arthropods were sampled with an insect suction sampler and predation and parasitism services were estimated by field observations and inspections of pest individuals.
Pest infestation was affected by landscape complexity, with higher aphid, but lower leafhopper numbers in more complex landscapes. Aphid predation was higher under organic farming and affected by effects on predator abundance and community composition independent of landscape complexity. Auchenorrhyncha parasitism was neither significantly affected by landscape complexity nor by farming category. Higher aphid predation rates and lower aphid densities were characteristic for organically managed fields with higher barley yields.
Our results suggest that it is possible to increase both aphid biological control services and barley yield via local management effects on predator communities independent of landscape complexity. However, the success of such management practices is highly dependent on the pest and natural enemy taxa and the nature of the trophic interaction.
KeywordsAphididae Araneae Auchenorrhyncha Dryinidae Ecosystem service Yield
- Anderson MJ (2001) A new method for non-parametric multivariate analysis of variance. Aust Ecol 26:32–46Google Scholar
- Bianchi FJJA, Van Der Werf W (2005) The function of non-crop habitats for sustainable pest control in agroecosystems. Trends Biodivers Res 147–170:2005Google Scholar
- Birkhofer K, Bezemer MT, Bloem J, Bonkowski M, Christensen S, Dubois D, Ekelund F, Fliessbach A, Gunst L, Hedlund K, Maeder P, Mikola J, Robin C, Setala H, Tatin-Froux F, Van Der Putten WH, Scheu S (2008b) Long-term organic farming fosters below and aboveground biota: implications for soil quality, biological control and productivity. Soil Biol Biochem 40:2297–2308CrossRefGoogle Scholar
- Birkhofer K, Fliessbach A, Wise DH, Scheu S (2008c) Generalist predators in organically and conventionally managed grass-clover fields: implications for conservation biological control. Annals Appl Biol 153:271–280Google Scholar
- Birkhofer K, Bezemer TM, Hedlund K, Setälä H (2012) Community composition of soil organisms under different wheat farming systems. In: Cheeke T, Coleman DC, Wall DH (eds) Microbial ecology in sustainable agroecosystems. Advances in agroecology. CRC Press, Boca Raton, p 292Google Scholar
- Birkhofer K, Entling M, Lubin Y (2013) Agroecology: trait composition, spatial relationships, trophic interactions. In: Penney D (ed) Spider research in the 21st century: trends & perspectives. Siri Scientific Press, ManchesterGoogle Scholar
- Carter N, Mclean IFG, WattAD Dixon AFG (1980) Cereal aphids: a case study and review. Appl Biol 5:271–348Google Scholar
- Dlabola J, Taimr L (1965) Some results obtained with the application of the tracer method in insect migration and dispersion studies. Acta Entomol Bohemoslov 62:413–420Google Scholar
- Guglielmino A (2002) Dryinidae (Hymenoptera Chrysidoidea): an interesting group among the natural enemies of the Auchenorrhyncha (Hemiptera). Denisia 176:549–556Google Scholar
- Hill DS (1987) Agricultural insect pests of temperate regions and their control. Cambridge University Press, LondonGoogle Scholar
- Jmhasly P, Nentwig W (1995) Habitat management in winter-wheat and evaluation of subsequent spider predation on insect pests. Acta Oecol 16:389–403Google Scholar
- Jonsson M, Buckley HL, Case BS, Wratten SD, Hale RJ, Didham RK (2012) Agricultural intensification drives landscape-context effects on host-parasitoid interactions in agroecosystems. J Appl Ecol 49:706–714Google Scholar
- Jordbruksverket (2014) Växtskyddsinfo Havrebladlusen och korn. http://www.jordbruksverket.se/etjanster/etjanster/vaxtskyddsinfo.4.35974d0d12179bec28580002425.html. Accessed Aug 2015
- Kennedy TF, Connery J (2005) Grain yield reductions in spring barley due to barley yellow dwarf virus and aphid feeding. Irish J Agric Food Res 44:111–128Google Scholar
- Lapierre H, Signoret P (2004) Viruses and virus diseases of Poaceae (Graminae). Inra-Quae, 857pGoogle Scholar
- Plumb RT (1983) Barley yellow dwarf virus-a global problem. In: Plumb RT, Thresh JM (eds) Plant virus epidemiology. The spread and control of insect-borne viruses. Blackwell Science, Oxford, pp 185–198Google Scholar
- Raatikainen M (1967) Bionomics, enemies and population dynamics of Javasella pellucida Fbr. (Homopt., Delphacidae). Annal Agric Fenniae 6:1–149Google Scholar
- Sigvald R (2011) Forecasting and warning systems for pests and diseases of field crops in Sweden. NJF Report 7:25–30Google Scholar
- Sunderland KD, Fraser AM, Dixon AFG (1986) Distribution of linyphiid spiders in relation to capture of prey in cereal fields. Pedobiologia 29:367–375Google Scholar
- Thies C, Haenke S, Scherber C, Bengtsson J, Bommarco R, Clement LW, Ceryngier P, Dennis C, Emmerson M, Gagic V, Hawro V, Liira J, Weisser WW, Winqvist C, Tscharntke T (2011) The relationship between agricultural intensification and biological control: experimental tests across Europe. Ecol Appl 21:2187–2196CrossRefPubMedGoogle Scholar
- Winqvist C, Bengtsson J, Aavik T, Berendse F, Clement LW, Eggers S, Fischer C, Flohre A, Geiger F, Liira J, Paert T, Thies C, Tscharntke T, Weisser WW, Bommarco R (2011) Mixed effects of organic farming and landscape complexity on farmland biodiversity and biological control potential across Europe. J Appl Ecol 48:570–579CrossRefGoogle Scholar