<strong>WEED HOSTS OF THE ROOT-LESION NEMATODE, PRATYLENCHUS SPEIJERI IN REPLANTING SITES CLEARED FROM NEMATODE-INFESTED PLANTAIN CV. APANTU-PA (MUSA SPP., AAB-GROUP) FIELDS IN GHANA</strong> [MALEZAS HOSPEDANTES DEL NEMATODO PRATYLENCHUS SPEIJERI EN CAMPOS PREVIAMENTE SEMBRADOS CON CULTIVOS DE PLÁTANO AFECTADOS POR NEMATODOS FIOPARÁSITOS EN GHANA]

Authors

  • Francis C. Brentu
  • C. Amoatey
  • E. Oppong
  • L. W. Duncan

Abstract

Twenty five weed species were collected from six fields after the removal of plantain (Musa spp., AAB-group) cv Apantu-pa plants severely damaged by plant–parasitic nematodes in Ghana. Weed roots were processed and analyzed for presence of plant-parasitic nematodes. Three nematode species, Helicotylenchus multicinctus, Meloidogyne javanica and Pratylenchus speijeri were detected in the roots of ten of the weed species growing in the fields. Six weed species including Rottboellia cochinchinensis, Panicum maximum, Acalypha ciliata, Sida acuta, Brachiaria deflexa and Fleurya aestuans were found to harbour P. speijeri. Rottboellia cochincinensis had the highest population density of P. speijeri with a mean nematode population density of about 19 vermiforms/g fresh root. Lower root densities of 1.5 and 1/g fresh root were observed on Sida acuta and Fleurya aestuans, respectively. The remaining four weeds were colonized by P. speijeri at population levels < 1 nematode/g fresh root. Three weed species (Ageratum conyzoides, Chromolaena odorata and Synedrella nodiflora) harboured only H. multicinctus. These results emphasize the importance of proper weed management in fallow land that is destined for plantain production.

Se colectaron 25 especies de malezas en seis campos después de la eliminación de cultivos de plátano (Musa spp., grupo AAB) cv Apantu-pa severamente afectados por nematodos fitoparásitos en Ghana. Se procesaron las raíces de las malezas para determinar la presencia de nematodos fitoparásitos. Se encontraron tres especies de nematodos, Helicotylenchus multicinctus, Meloidogyne javanica y Pratylenchus speijeri, en las raíces de diez de las malezas colectadas. Seis de las especies de malezas, Rottboellia cochinchinensis, Panicum maximum, Acalypha ciliata, Sida acuta, Brachiaria deflexa y Fleurya aestuans, albergaban P. speijeri. Rottboellia cochincinensis tuvo las poblaciones más altas de P. speijeri con una densidad promedio de 19 vermiformes/ g de raíz fresca. Se observaron densidades de 1.5 y 1 nematodo/g de raíz fresca en Sida acuta y Fleurya aestuans, respectivamente. Las cuatro malezas restantes estaban colonizadas por P. speijeri a niveles menores de 1 nematodo/g raíz fresca. Tres especies de malezas (Ageratum conyzoides, Chromolaena odorata y Synedrella nodiflora) albergaron sólo H. multicinctus. Estos resultados resaltan la importancia del manejo adecuado de malezas en campos que se van a utilizer para cultivar plátano.

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Published

2013-06-01

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Section

ELECTRONIC ARTICLE/ARTICULO ELECTRONICO