title: Checklist for the crop weeds of Paraguay.
abstract: Paraguay, a country whose economy is based mainly on agriculture and livestock for export, has experienced a major expansion in mechanized crops during the last few decades. Despite being heavily dependent on agriculture, Paraguay has very limited research on crop weeds, in spite of these having a high economic impact on production. This work aims to update and enhance the knowledgebase on the most common weeds affecting productive fields throughout the different ecoregions of Paraguay. We present here the first checklist of crop weeds for the country, which includes a total of 256 taxa (189 species, 10 subspecies, 54 varieties and 3 forms), with the most species-rich families being Poaceae and Asteraceae followed by Malvaceae, Amaranthaceae, Fabaceae and Solanaceae. The list includes three new records for the country. Synonyms, distribution details within Paraguay, habit and a voucher specimen are provided for each taxon.
authors.affiliation: Associate Researcher for the Centro para el Desarrollo de la Investigación Científica. Fundación Moisés Bertoni para la Conservación de la Naturaleza y Laboratorios Díaz-Gill, Manduvirá 635, Asunción, Paraguay; Researcher for the Programa Nacional de Incentivo a Investigadores del Consejo Nacional de Ciencia y Tecnología (CONACYT), Paraguay.
authors.forename: Juana
authors.initials: J
authors.lastname: De Egea
authors.affiliation: Associate Researcher for the Centro para el Desarrollo de la Investigación Científica. Fundación Moisés Bertoni para la Conservación de la Naturaleza y Laboratorios Díaz-Gill, Manduvirá 635, Asunción, Paraguay; Researcher for the Programa Nacional de Incentivo a Investigadores del Consejo Nacional de Ciencia y Tecnología (CONACYT), Paraguay.
authors.forename: Fátima
authors.initials: F
authors.lastname: Mereles
authors.affiliation: The Natural History Museum, Cromwell Rd, London SW75BD, U.K.
authors.forename: María Del Carmen
authors.initials: MD
authors.lastname: Peña-Chocarro
authors.affiliation: Associate Researcher for the Centro para el Desarrollo de la Investigación Científica. Fundación Moisés Bertoni para la Conservación de la Naturaleza y Laboratorios Díaz-Gill, Manduvirá 635, Asunción, Paraguay; Researcher for the Programa Nacional de Incentivo a Investigadores del Consejo Nacional de Ciencia y Tecnología (CONACYT), Paraguay; Asociación Etnobotánica Paraguaya, Julia Miranda Cueto de Estigarribia 795, Edificio Mariucci, 2° piso, oficina 208, San Lorenzo, Paraguay.
authors.forename: Gloria
authors.initials: G
authors.lastname: Céspedes
keywords: Paraguay; Weeds; agro-ecosystems; crops; new records