Fecha/hora: 03/06/2024 05:29:23

Biblioteca(s): 	INIA Las Brujas.	
Fecha corriente: 	05/02/2020	
Fecha de la última actualización: 	05/02/2020	
Autoria: 	BERNAL, R.; BERGER, R.D.	
Afiliación: 	ROBERTO FRANCISCO BERNAL PIACENTINI, INIA (Instituto Nacional de Investigación Agropecuaria), Uruguay; R. D. BERGER, Plant Pathology Department, University of Florida, Gainesville, FL, United States.	
Título: 	The spread of epiphytic populations of Xanthomonas campestris pv. vesicatoria on pepper in the field.	
Año de publicación: 	1996	
Fuente/Imprenta: 	Journal of Phytopathology, 1996, Volume 144, Issue 9-10, Pages 479-484.	
ISSN: 	0931-1785	
DOI: 	10.1111/j.1439-0434.1996.tb00328.x	
Idioma: 	Inglés	
Notas: 	Article history: Received January 18 1996 / Accepted May 25 1996.	
Contenido: 	ABSTRACT.
The spread of the epiphytic population of Xanthomonas campestris pv. vesicatoria and the disease it causes, bacterial leaf spot, were studied in field plots of pepper near Gainesville, Florida. In the summer of 1989, the epiphytic population of X. campestris pv. vesicatoria was dispersed to the west-northwest from point sources of diseased plants. Winds from the southeast during rainstorms were essential for the spread of bacteria in the field. In the autumn of 1989, a focus of bacterial leaf spot developed naturally near the centre of the experimental plot. The epiphytic population of X. campestris pv. vesicatoria increased sharply after a 2-day rain accompanied with strong wind. The wind was believed to be responsible for the transport of bacteria to distances 32 m from the focus. Initially in both seasons, the epiphytic populations occurred as distinct gradients from the focal sources of diseased plants. These gradients flattened over time and the disease incidence increased to near 100%. The increase in the epiphytic populations of the pathogen to > 3.0 log10 (cfu cm-2) on healthy plants away from the foci preceded disease appearance by several weeks. Applications of cupric hydroxide plus mancozeb significantly reduced the epiphytic population of X. campestris pv. vesicatoria on pepper leaves and slowed the spread of disease in the plots.	
Palabras-Clave: 	Bacteria (microorganisms); Vesicatoria.	
Thesagro: 	XANTHOMONAS; XANTHOMONAS CAMPESTRIS pv.	
Categoría del tema: 	H20 Enfermedades de las plantas	
Registro original: 	INIA Las Brujas (LB)	
Ejemplares: 	LB - (102165-1) - PXI - AP - DD - PP/JR.PHYTOPATHOLOGY/1996 -  -  - DIS