Yield increase attributable to aphid predation by ground-living polyphagous natural enemies in spring barley in Sweden

Östman, Ö., B. Ekbom and J. Bengtsson. 2003. Yield increase attributable to aphid predation by ground-living polyphagous natural enemies in spring barley in Sweden. Ecological Economics 25: 149-158. Keywords: 5i, 4o, 10

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