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ENFERMEDADES BACTERIANAS DEL TIQUISQUE (Xanthosoma spp.) EN COSTA RICA

Author

Listed:
  • Laguna, Irma
  • Salazar, Luis
  • López, Fernando

Abstract

El cultivo del tiquisque (Xanthosoma spp) está adquiriendo mayor importancia en Costa Rica en los últimos años, siendo las especies utilizadas el tiquisque blanco (X. sagittifolium Schott) y el tiquisque morado (X. violaceum). En las áreas productoras se han detectado dos-enfermedades bacterianas, Mancha bacteriana: causada por Xanthomonas campestris p. v. aracearum (Berniac)Dye, cuyos síntomas se manifiestan como manchas clor6ticas pequeñas y abundantes que pueden cubrir toda la superficie foliar. Esta enfermedad se presenta en la región Atlántica. En algunas de las localidades observadas se ha registrado una incidencia que alcanza el 90%. Necrosis marginal bacteriana: causada por Xanthomonas campestris (Pammel) Dowson, cuya infección comienza como una necrosis en los márgenes de las hojas que va avanzando hacia el interior de la lámina y puede continuar necrosando las nervaduras y posteriormente los pecfolos. Esta enfermedad está distribuida en todas las áreas donde se cultiva tiquisque en Costa Rica. ----- During the last years, cocoyam crops have acquired more importance in Costa Rica. The species used are white cocoyam (Xanthosoma sagittifolium Schott) and purple cocoyam (Xanthosoma violaceum). In the production areas two diseases have been detected. Bacterial Spot: caused by Xanthomonas campestris p.v. aracearum (Berniac) Dye. Symptoms were shown as abundant small clorotic spots that can cover all of the foliar area. This disease is present only in the Atlantic Zone (Limôn), and in some places an incidence of almost 90% has been observed. Bacterial Necrotic Margin: caused by Xanthomonas campestris (Pammel) Dowson. The infection starts like a necrosis on the edge of the leaves, and it continues to the interior of them. It can keep necrosising the nervures and later the petioles. This disease is spread in all the areas of Costa Rica that grow cocoyam. Morfological, physiological, and pathogenic testings were made in both diseases for their identification.

Suggested Citation

  • Laguna, Irma & Salazar, Luis & López, Fernando, 1983. "ENFERMEDADES BACTERIANAS DEL TIQUISQUE (Xanthosoma spp.) EN COSTA RICA," 19th Annual Meeting, September 11-17, 1983, Puerto Rico 261645, Caribbean Food Crops Society.
    • Handle: RePEc:ags:cfcs83:261645
    DOI: 10.22004/ag.econ.261645
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