Resumo

JUAN, V. F; MARTINOIA, G.I; SAINT ANDRE, H.M  e  NUNEZ FRE, F.R. Lixus y mordellistena larvas de coleópteros barrenadores de tallo en plantas de rama negra (conyza bonariensis l.). FAVE. Secc. Cienc. agrar. [online]. 2015, vol.14, n.2. ISSN 1666-7719.

Lixus and Mordellistena stem borer larvae in Hairy Fleabane (Conyza bonaeriensis L.) plants In the center of Buenos Aires Province, during the crop year 2014/2015 two endophytic stem borer larvae were found in Hairy Fleabane plants. In order to study and identify the species, samples of this weed were collected and taken to the laboratory for dissection. The larvae corresponded to two insects of the Coleoptera order, Curculionidae and Mordellidae families. The Curculionidae borer belongs to the genus Lixus and the Mordellidae borer was identified as Mordellistena genus. Adults individuals were obtained from Hairy Fleabane in pots, and from field sampling plants, in some cases within the galleries. Even if these individuals can act as natural enemies of Hairy Fleabane, it must be pointed out that some background information mentions larvae of stem-boring insects, that may cause a negative effect on chemical control practices, as they limit the transport of systemic herbicides

Palavras-chave : Conyza spp; Coleoptera; Stem borer larvae; Endophagus.

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