insects Article The Role of Annual Flowering Plant Strips on a Melon Crop in Central Spain. Influence on Pollinators and Crop Celeste Azpiazu 1,* , Pilar Medina 1,2, Ángeles Adán 1,2, Ismael Sánchez-Ramos 3, Pedro del Estal 1,2, Alberto Fereres 2,4 and Elisa Viñuela 1,2 1 Escuela Técnica Superior de Ingeniería Agronómica, Alimentaria y de Biosistemas, Universidad Politécnica de Madrid (ETSIAAB-UPM), Avenida Puerta de Hierro 2-4, 28040 Madrid, Spain;
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[email protected] (E.V.) 2 Unidad Asociada IVAS (UPM-CSIC): Control de Insectos Vectores bajo sistemas de Agricultura Sostenible, 28040 Madrid, Spain;
[email protected] 3 Instituto Nacional de Investigación y Tecnología Agraria y Alimentaria, O.A., M.P. (INIA), Carretera de la Coruña Km 7.5, 28040 Madrid, Spain;
[email protected] 4 Instituto de Ciencias Agrarias, Consejo Superior de Investigaciones Científicas (ICA-CSIC), Serrano 115 Dpdo, 28006 Madrid, Spain * Correspondence:
[email protected] Received: 11 November 2019; Accepted: 16 January 2020; Published: 20 January 2020 Abstract: Planting flower strips adjacent to crops is among the habitat-management practices employed to offer alternative floral resources to pollinators. However, more information is needed to understand their potential spill-over of pollinators on nearby insect-pollinated crops. Over the course of two consecutive years, the suitability of a flower mixture of 10 herbaceous plants for pollinators was evaluated on a weekly basis, in a randomized block design of two melon plots (10 10 m2) × with or without 1 m-wide flower strips.