Thrips species (Insecta: Thysanoptera) associated to Cowpea in Piauí, Brazil.

Thrips are still poorly known in cowpea, Vigna unguiculata (L.) Walp., in Piauí, despite their economic importance in this crop, which stands out as one of the major cultures of North and Northeast regions from Brazil. Thus, this study aimed to identify the thrips species associated to the crop in Teresina and Bom Jesus, Piauí, Brazil. From October 2007 to August 2008, cowpea inflorescences were sampled in the municipalities by the technique of simple bagging. After screenings, thrips were preserved in AGA, mounted on permanent microscope slides and identified. The identified species were: Frankliniella brevicaulis Hood, 1937, F. insularis (Franklin, 1908), F. schultzei (Trybom, 1910), F. tritici (Fitch, 1855) and Haplothrips gowdeyi (Franklin, 1908). The slides are deposited at the entomological collection of the Departamento de Biologia, Universidade Federal do Piauí. A key to the species is provided