Llauger Raixa, Cueto Jorge R., Peralta Esther Lilia, Rohde Wolfgang, Dollet Michel, Becker Dieter, Rodriguez M., Juncal J., Rodriguez R., Gonzalez V..
2003. The lethal yellowing of the coconut tree in Cuba: Current situation : El amarillamientoletal del cocotero en Cuba: Situacion actual.
In : Pan American Plant disease Conference : 42nd Annual meeting on the American Phytopapthological Society-Caribbean Division, South Padre Island, Texas, U.S.A, April 6-10, 2003
Titre espagnol : El amarillamientoletal del cocotero en Cuba: Situacion actual
Résumé : The aims of this work have been to validate the PCR technique for the diagnosis of lethal yellowing of the coconut tree (LY); to determine the current distribution of the disease in the country; to know the existence of possible vectors and to compare the phytoplasmas associated to LY in Pilon and Baracoa regions, everything directed to establish the bases for LY management in Cuba. Performance parameters of PCR optimised procedure were above 97%. Requirements for field evaluation and sample type were also established in order to increase the detection effectiveness. The detection limit of this assay is of 0,1 ng and 50 fg, according to the sample type. The infection percentage in the different evaluated provinces stays below 2%, being determined that the Green Indian, green hybrids and Criollo coconut were those more affected under natural conditions, constituting the 31.25; 15.62 and 18.75% respectively of the total affected and analysed plants. Germ-plasma evaluations proved that a great number of hybrid and "varieties!' remain healthy under natural conditions, indicating the presence of possible resistance sources, essential aspect for further plans of breeding and crop management. It was detected for the first time in Cuba the presence of Nymphocixia caribbea Fennah (Homoptera: Cixiidae) associated to plantations of coconut trees affected by LY. The isolations of the two studied regions differed in their restriction patterns with the enzymes Rsal EcoRl and Alul. (Texte intégral)
Classification Agris : H20 - Maladies des plantes
Auteurs et affiliations
- Llauger Raixa, IIFT [Instituto de Investigaciones en Fruticultura Tropical] (CUB)
- Cueto Jorge R., IIFT [Instituto de Investigaciones en Fruticultura Tropical] (CUB)
- Peralta Esther Lilia, INICA (CUB)
- Rohde Wolfgang, MPIZ (DEU)
- Dollet Michel, CIRAD-EMVT-SANTE ANIMALE (FRA)
- Becker Dieter, MPIZ (DEU)
- Rodriguez M., IIFT [Instituto de Investigaciones en Fruticultura Tropical] (CUB)
- Juncal J., IIFT [Instituto de Investigaciones en Fruticultura Tropical] (CUB)
- Rodriguez R., IES [Instituto de Ecología y Sistemática] (CUB)
- Gonzalez V., Empresa del Coco Baracoa (CUB)
Autres liens de la publication
Source : Cirad - Agritrop (https://agritrop.cirad.fr/517446/)
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