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dc.contributor.advisorSegarra-Carmona, Alejandro E.
dc.contributor.authorNieves-Méndez, Nisael
dc.description.abstractRecently, mango seedlings (Mangifera indica L.) showing symptoms of mango malformation syndrome were detected Puerto Rico. Typical symptoms were: mottled and deformed leaves, defoliation, and loss of apical dominance. The objective of the present study was to identify the causal agent of the symptoms previously described. Diagnose molecular tests were made to detect phytoplasms and virus. Two species of mites were associated with the symptoms: Polyphagotarsonemus latus Banks (Acari: Tarsonemidae) and Neocalacarus mangiferae Channabasavanna (Acari: Eriophyidae). Tests for phytoplasms and virus resulted all negative. The findings indicate that P. latus causes leaf deformation, which possibly causes defoliation, and development of lateral buds. No fungi were isolated from these seedlings. In contrast, N. mangiferae also caused the development of lateral buds, but did not induce leaf deformation. Fusarium lateritium was isolated associated to the symptoms and confirmed by pathogenicity test as a pathogen in mango seedlings causing cankers and lateral buds.en_US
dc.description.abstractEn Puerto Rico, se detectó la presencia del síndrome de malformación en semilleros de árboles de mangó (Mangifera indica L.). Los síntomas observados fueron: deformación y moteado en las hojas, defoliación y perdida de dominancia apical. El objetivo de éste estudio fue identificar el agente causal de los síntomas antes descritos. Se realizaron pruebas de diagnóstico a nivel molecular para detectar fitoplasmas y virus. Además se identificaron dos especies de ácaros, Polyphagotarsonemus latus Banks (Acari: Tarsonemidae) y Neocalacarus mangiferae Channabasavanna (Acari: Eriophyidae), asociados a los daños. Las pruebas para detectar virus y fitoplasmas resultaron negativas. Se observó que P. latus causa deformación de las hojas, defoliación y desarrollo de brotes laterales. En ensayos realizados con N. mangiferae se observó desarrollo de brotes laterales y no hubo defoliación. Se aisló Fusarium lateritium asociado a éstos daños y mediante pruebas de patogenicidad se corroboró que es patógeno en árboles de mangó en etapa de semillero causando cancros y brotes laterales.en_US
dc.subjectSíndrome de malformaciónen_US
dc.subjectDominancia apicalen_US
dc.subject.lcshMango--Puerto Rico--Diseases and pests--Identificationen_US
dc.titleEtiología de la malformación del tejido vegetativo del mango (Mangifera indica L.) en Puerto Ricoen_US
dc.rights.licenseAll rights reserveden_US
dc.rights.holder(c) 2005 Nisael Nieves Méndezen_US
dc.contributor.committeeRivera Vargas, Lydia I.
dc.contributor.committeeAbreu Rodríguez, Edwin
dc.contributor.representativeBerrios Ortíz, Angel Protectionen_US
dc.contributor.collegeCollege of Agricultural Sciencesen_US
dc.contributor.departmentDepartment of Crops and Agro-Environmental Sciencesen_US

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