INFIVE   05416
INSTITUTO DE FISIOLOGIA VEGETAL
Unidad Ejecutora - UE
artículos
Título:
Sipha maydis: distribution and host range of a new pest of winter cereals in Argentina
Autor/es:
CORRALES, C. E., CASTRO A.M., RICCI, M. AND A.F.G. DIXON
Revista:
JOURNAL OF ECONOMIC ENTOMOLOGY
Editorial:
Entomological Society of America
Referencias:
Lugar: Maryland; Año: 2007 vol. 100 p. 1781 - 1781
ISSN:
0022-0493
Resumen:
Sipha maydis (Passerini) is a new pest of cereals, and cultivated and wils grasses in Argentina. This species was recently introduced into America and nothing is known of its distribution or host range in South America. This paper records 1. the distribution and 2. the host range of S. maydis in Argentina. Over the period 2004-2006 samples were collected from thirty two populations at several localities in Argentina. The number of S. maydis, accompanying aphid species and the host from which they were collected were recorded. The distribution of S. maydis ranged from 32°52´ to 42°03´ S, and from 57°41´ to 71°24´ W, bounded by isothermals 18°C and 10°C and isohyets 200-400 mmand< 1200 mm. No S. maydis were found in the subtropical region, even in winter. In the field the different populations showed very different host preferences. It was found mainly on cultivated barley and wheat and on wild Bromus and sorghum halepense. No ahids were found on maize. Most of the damage to winter cereal crops occurred at seedling stage in early autumn and of adult plants when infestations occurred in late spring. In four years following the first record of S. maydis in Argentina it colonized a huge area similar to that colonized by D. noxia in ten years. The wide range of regions, hosts and climatic conditions this species is adapted to is likely to make the control of this pest very difficult
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