agronomy Article Annual Wildflower Strips as a Tool for Enhancing Functional Biodiversity in Rye Fields in an Organic Cultivation System Krzysztof Kujawa 1,*, Zdzisław Bernacki 1, Jolanta Kowalska 2 , Anna Kujawa 1, Maria Oleszczuk 1, Paweł Sienkiewicz 3 and Dariusz Sobczyk 1 1 Institute for Agricultural and Forest Environment, Polish Academy of Sciences, Bukowska 19, 60-809 Pozna´n, Poland;
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[email protected] (D.S.) 2 Department of Organic Agriculture and Environmental Protection, Institute of Plant Protection—National Research Institute, Władysława W˛egorka20, 60-318 Pozna´n,Poland;
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[email protected] Received: 26 September 2020; Accepted: 30 October 2020; Published: 2 November 2020 Abstract: Ecological intensification of agriculture (e.g., with the use of wildflower strips) is being currently discussed as a mean for gaining high yields, preserving high biodiversity of farmland. The aim of this study was to assess the efficiency of annual wildflower strips (WFSs) established in rye field (RF) in (1) increasing species richness and abundance in terms of beneficial arthropod groups (carabids, ground spiders, plant spiders, butterflies, insect pollinators and plant-dwelling insect predators), (2) decreasing the abundance of insect pests, (3) decreasing damages of the crop, and (4) increasing the yield. The field survey was carried out in 2019, in two WFSs and in the adjacent crop field at the distances of 3, 9, 21 and 45 m.