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DYNAMIQUE DES POPULATIONS D'U N NEMATODE (Pratylenchus coffeae) DANS LES IGNAMES EN COURS DE CONSERVATION

Author

Listed:
  • Kermarrec, A.
  • Anais, A.
  • Gamiette, F.
  • Suard, C.
  • Dos Santos, F.

Abstract

La dynamique des populations de Pratylenchus coffeae dans les tubercules de Dioscorea cayenensis du type «Grosse caille» est décrite en cours de culture, à la récolte et lors de la conservation sur les populations d'endoparasites est analysée. La répartition des nématodes le long du tubercule est suivie dans le temps et les risques de contamination de la culture suivante sont présentés. Une méthode non destructive d'échantillonnage des nématodes, par biopsie du parenchyme cortical des tubercules, est proposée : elle permet une évaluation des niveaux d'infestation des tissus vivants et autorise la plantation des semenceaux sans en altérer la germination. Les méthodes d'extraction des nématodes sont comparées (entonnoir de BAERMANN versus centrifugation) pour un diagnostic rapide. Différentes stratégies de contrôle de Pratylenchus sont proposées. ----- Population dynamics of the root-lesion nematode ( Pratylenchus coffeae) is followed in the tubers of Dioscorea cayenensis from the plantation in the field until the end of the storage. The impact of various conservation conditions is evaluated on the nematode's reproduction. The distribution of parasites inside the tuber is described and the contamination risk for a new production cycle are underlined. A non-destructive sampling method is proposed by biopsy of the tubers : it allows nematological studies and succesfull replantation of the analysed tubers. Nematode extraction methods are compared (BAERMANN funnel versus centrifugation) in a diagnostic purpose. Different control strategies of Pratylenchus are proposed.

Suggested Citation

  • Kermarrec, A. & Anais, A. & Gamiette, F. & Suard, C. & Dos Santos, F., 1989. "DYNAMIQUE DES POPULATIONS D'U N NEMATODE (Pratylenchus coffeae) DANS LES IGNAMES EN COURS DE CONSERVATION," 25th Annual Meeting, July 1-6, 1989, Gosier, Guadeloupe 259913, Caribbean Food Crops Society.
    • Handle: RePEc:ags:cfcs89:259913
    DOI: 10.22004/ag.econ.259913
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