La diversidad de delfácidos en áreas maiceras de la Pcia. de Córdoba: hacia la detección de otros posibles vectores del MRCV (Insecta – Hemiptera).

REMES LENICOV, A.M. MARINO DE; LAGUNA, I.G.; MARIANI, ROXANA; PARADELL, SUSANA; CALATANO, INÉS; VIRLA, EDUARDO G.; GIMENEZ PECCI, Mº DE LA PAZ

Rosario, Santa Fé

Congreso; VIII Congreso nacional de maíz; 2005

AIANBA - MAIZAR

Among the Hemiptera Auchenorrhyncha, the planthoppers ocuppyng the 2nd place of importance because of their role as vectors of different crop infections such as rice, corn, wheat and several forrage crops. 27 delphacids specie are known as vectors, 6 of them are registered in Argentina: Tagosodes orizicolus (Rice Hoja Blanca Virus vector), T. cubanus (Echinochloa Hoja Blanca Virus vector), Peregrinus maidis, (Maize Stripe Virus and Maize mosaic virus vector), Delphacodes kuscheli,, D. haywardi and T. propinqua ( MRCV vectors), all of them are economically important species in their main dispersal area. Considering the significance of the MRCV, an endemic disease of maize crop in central Argentina, and in order to improve the regional knowledge about the vector planthopper communities composition, it was studied the richness and abundance of delphacids that inhabit maize crops in different agroecological areas of Córdoba province. It was also analysed comparing the presence and relative abundance of vector and non vector species during the maize vegetative stage in each area. The survey was carried out in Córdoba province on corn crops from November to February during the period (2002-2004). Insects were gathered from 41 localities which were grouped in four areas according to each particular agroecologic condition. Each sample was made by sweeping in 50 strikes; three non-systematic samples were taken each year in each locality. The seven delphacid species more frequently captured were: D. kuscheli Fennah, D. haywardi Muir, T. propinqua  (Fieber), D. humilis Muir, D. tigrinus Remes Lenicov y Varela, D. fallax Muir y Tagosodes orizicolus (Muir). The frequency and abundance of D. humilis and D. fallax on infected crops in the northern area, makes us consider them as candidates to further transmission studies.