Interações epidemiológicas de vírus em feijão caupi Vigna unguiculata (L.) Walp. no semiárido paraibano.

Abstract

Cowpea can be affected by several diseases, among which the v roses constitute a limiting factor for culture. It is of great importance to understanding of the ways in which these pathogens are disseminated in the field, the objectives of this work were to detect the presence of viruses in seeds of lbijãoaupi by means of biological tests e. check for the presence of plants weed hosts of viruses. The seeds were collected from fields. of production with a history of the occurrence of viruses in the municipalities. Paulista and Lagoa The seeds were sown individually in. 128 cell styrofoam containing sterile commercial substrate and the plants spin assessed by visual observation of the symptoms in the primary leaves and the weeds with typical symptoms of mosaic and leaf deformation were collected in the municipalities of Sousa, Pombal and Paulista, and analyzed. 'enzyme linked immunosorbent assay' (Elisa) indirect against specific antisera for Cowpea aph / dborno mosalc vlms (CABMV) and Cucumber mosalc wms (CMV) .e by double diffusion in agar against anta-serum for Cowpea severa mofa / c wn'i / s (CPSMV). Weed assessment. virus hosts of the genus Begomovil'us was based on the comparison. gives . symptomatology with the literature oxlstente. From the results obtained, no virus was detected in bean seeds-- cowpea through biological tests. predominant weeds in the region that act 'as possible reservoirs of begomoviruses belonging to the genera SeRRa spp., Sida spp. and Mac / opff // a spp.