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Fluctuation saisonnière de la nématofaune associée à la canne à sucre à la Martinique sur ferrisol remodelé et non remodelé

Author

Listed:
  • Delaville, L.
  • Queneherve, P.
  • Albrecht, A.

Abstract

Le suivi sur une année de la nématofaune associée à la canne à sucre a mis en évidence des différences dans les fluctuations saisonnières des nématodes rencontrés. Parmi les espèces phytoparasites, les densités de population d' Hemicriconemoides cocophilus et de Pratylenchus zeae sont significativement plus importantes durant la période de septembre à décembre (saison des pluies) tandis que l'espèce Mesociconema onoense présente des maxima de populations en saison sèche (mars). Le nivellement des parcelles de canne à sucre lors du remodelage, a entrainé l'affleurement d'horizons B ou C situés initialement en profondeur. Dans ces zones, les nématodes ne présentent ni les mêmes fluctuations ni la même composition : dans la zone profondément remodelée les 4 espèces P. zeae, H. cocophilus, M. onoense et H. erythrinae concourent respectivement pour 35, 35, 20, et 10 % du peuplement, tandis que dans la zone non remodelée les 2 premières espèces sont largement prédominantes (45, 35, 5 et 15 %). Ces premiers résultats démontrent que l'incidence des saisons sur les densités de populations et la composition du peuplement est moins importante que celle exercée par les propriétes édaphiques. ----- One year monitoring of sugarcane nematodes community showed differencies in nematode seasonal fluctuations. Population densities of Hemicriconemoïdes cocophilus and Pratylenchus zeae are significantly higher during the rainy season (september to december) white population peaks of M. ONOENSE occur during the dry season (march). Levelling sugarcane plots during hillock-levelling results in small area outcrops of B or C horizons. In these areas, the nematode populations did not show the same fluctuations nor the same compositions. In the hillock-levelled areas the 4 nematode species P. zeae, H. cocophius, M. onoense and H. erythrinae concur to 35, 35, 20 and 10 % of the nematode community, while in the non levelled area the 2 first species are predominant (45, 35, 5 and 15 %). These results show that the seasonal impact on nematodes densities and communities is lower than this played by soil properties.

Suggested Citation

  • Delaville, L. & Queneherve, P. & Albrecht, A., 1993. "Fluctuation saisonnière de la nématofaune associée à la canne à sucre à la Martinique sur ferrisol remodelé et non remodelé," 29th Annual Meeting, 1993, Martinique 258805, Caribbean Food Crops Society.
    • Handle: RePEc:ags:cfcs93:258805
    DOI: 10.22004/ag.econ.258805
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